Introduction |
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1 | (4) |
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1 | (1) |
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2 | (1) |
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3 | (1) |
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4 | (1) |
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4 | (1) |
Part 1: Introducing String Theory |
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5 | (40) |
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Chapter 1 So What Is String Theory Anyway? |
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7 | (14) |
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String Theory: Seeing What Vibrating Strings Can Tell Us about the Universe |
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8 | (3) |
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Using tiny and huge concepts to create a theory of everything |
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8 | (2) |
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A quick look at where string theory has been |
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10 | (1) |
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Introducing the Key Elements of String Theory |
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11 | (4) |
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11 | (2) |
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13 | (1) |
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13 | (1) |
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13 | (1) |
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14 | (1) |
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Understanding the Aim of String Theory |
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15 | (3) |
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15 | (1) |
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15 | (1) |
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Explaining matter and mass |
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16 | (1) |
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17 | (1) |
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Appreciating the Theory's Amazing (and Controversial) Implications |
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18 | (1) |
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Landscape of possible theories |
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18 | (1) |
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The universe as a hologram |
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19 | (1) |
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Why Is String Theory So Important? |
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19 | (2) |
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Chapter 2 The Physics Road Dead-Ends at Quantum Gravity |
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21 | (14) |
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Understanding Two Schools of Thought on Gravity |
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22 | (3) |
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Newton's law of gravity: Gravity as force |
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22 | (2) |
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Einstein's law of gravity: Gravity as geometry |
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24 | (1) |
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Describing Matter: Physical and Energy-Filled |
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25 | (1) |
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Viewing matter classically: Chunks of stuff |
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25 | (1) |
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Viewing matter at a quantum scale: Chunks of energy |
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26 | (1) |
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Grasping for the Fundamental Forces of Physics |
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26 | (2) |
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Electromagnetism: Super-speedy energy waves |
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27 | (1) |
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Nuclear forces: What the strong force joins, the weak force tears apart |
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28 | (1) |
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Infinities: Why Einstein and the Quanta Don't Get Along |
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28 | (3) |
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Singularities: Bending gravity to the breaking point |
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29 | (1) |
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Quantum jitters: Space-time under a quantum microscope |
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30 | (1) |
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31 | (4) |
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Einstein's failed quest to explain everything |
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32 | (1) |
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A particle of gravity: The graviton |
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32 | (1) |
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Supersymmetry's role in quantum gravity |
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33 | (2) |
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Chapter 3 Accomplishments and Failures of String Theory |
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35 | (10) |
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Celebrating String Theory's Successes |
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36 | (3) |
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Predicting gravity out of strings |
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36 | (1) |
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Explaining what happens to a black hole (sort of) |
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36 | (1) |
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Explaining quantum field theory using string theory |
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37 | (1) |
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String theory keeps making a comeback |
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38 | (1) |
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Being the most popular theory in town |
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38 | (1) |
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Considering String Theory's Setbacks |
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39 | (3) |
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The universe doesn't have enough particles |
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40 | (1) |
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Dark energy: The discovery string theory should have predicted |
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40 | (1) |
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Where did all these "fundamental" theories come from? |
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41 | (1) |
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Looking into String Theory's Future |
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42 | (5) |
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Theoretical complications: Can we figure out string theory? |
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43 | (1) |
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Experimental complications: Can we prove string theory? |
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43 | (2) |
Part 2: The Physics Upon Which String Theory Is Built |
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45 | (116) |
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Chapter 4 Putting String Theory in Context: Understanding the Method of Science |
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47 | (14) |
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Exploring the Practice of Science |
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48 | (6) |
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The myth of the scientific method |
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48 | (2) |
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The need for experimental falsifiability |
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50 | (2) |
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The foundation of theory is mathematics |
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52 | (1) |
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53 | (1) |
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The role of objectivity in science |
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53 | (1) |
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Understanding How Scientific Change Is Viewed |
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54 | (7) |
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Precision and accuracy: Science as measurement |
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54 | (1) |
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Old becomes new again: Science as revolution |
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55 | (1) |
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Combining forces: Science as unification |
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56 | (1) |
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What happens when you break it? Science as symmetry |
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57 | (4) |
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Chapter 5 What You Must Know about Classical Physics |
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61 | (20) |
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This Crazy Little Thing Called Physics |
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62 | (5) |
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No laughing matter: What we're made of |
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62 | (2) |
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Add a little energy: Why stuff happens |
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64 | (1) |
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Symmetry: Why some laws were made to be broken |
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65 | (2) |
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All Shook Up: Waves and Vibrations |
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67 | (4) |
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67 | (2) |
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Getting some good vibrations |
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69 | (2) |
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Newton's Revolution: How Physics Was Born |
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71 | (4) |
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Force, mass, and acceleration: Putting objects into motion |
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72 | (1) |
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Gravity: A great discovery |
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73 | (1) |
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Optics: Shedding light on light's properties |
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74 | (1) |
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Calculus and mathematics: Enhancing scientific understanding |
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74 | (1) |
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The Forces of Light: Electricity and Magnetism |
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75 | (6) |
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Light as a wave: The ether theory |
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75 | (1) |
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Invisible lines of force: Electric and magnetic fields |
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76 | (2) |
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Maxwell's equations bring it all together: Electromagnetic waves |
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78 | (1) |
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Two dark clouds and the birth of modern physics |
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79 | (2) |
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Chapter 6 Revolutionizing Space and Time: Einstein's Relativity |
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81 | (20) |
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What Waves Light Waves? Searching for the Ether |
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82 | (2) |
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No Ether? No Problem: Introducing Special Relativity |
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84 | (5) |
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86 | (2) |
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88 | (1) |
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Changing Course: Introducing General Relativity |
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89 | (8) |
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89 | (2) |
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91 | (2) |
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Testing general relativity |
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93 | (3) |
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Surfing the gravitational waves |
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96 | (1) |
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Applying Einstein's Work to the Mysteries of the Universe |
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97 | (1) |
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Kaluza-Klein Theory - String Theory's Predecessor |
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98 | (3) |
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Chapter 7 Brushing Up on Quantum Theory Basics |
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101 | (18) |
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Unlocking the First Quanta: The Birth of Quantum Physics |
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102 | (2) |
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Fun with Photons: Einstein's Nobel Idea of Light |
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104 | (3) |
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Waves and Particles Living Together |
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107 | (4) |
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Light as a wave: The double slit experiment |
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107 | (1) |
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Particles as a wave: The de Broglie hypothesis |
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108 | (2) |
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Quantum physics to the rescue: The quantum wavefunction |
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110 | (1) |
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Why We Can't Measure It All: The Uncertainty Principle |
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111 | (1) |
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Dead Cats, Live Cats, and Probability in Quantum Physics |
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112 | (2) |
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Does Anyone Know What Quantum Theory Means? |
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114 | (1) |
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Quantum Units of Nature: Planck Units |
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115 | (4) |
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Chapter 8 The Standard Model of Particle Physics |
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119 | (22) |
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Atoms, Atoms, Everywhere Atoms: Introducing Atomic Theory |
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120 | (2) |
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Popping Open the Atomic Hood and Seeing What's Inside |
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122 | (3) |
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122 | (1) |
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The nucleus is the thing in the middle |
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123 | (1) |
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Watching the dance inside an atom |
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124 | (1) |
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The Quantum Picture of the Photon: Quantum Electrodynamics |
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125 | (5) |
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Dr. Feynman's doodles explain how particles exchange information |
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125 | (3) |
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Discovering that other kind of matter: Antimatter |
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128 | (1) |
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Sometimes a particle is only virtual |
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129 | (1) |
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Digging into the Nucleus: Quantum Chromodynamics |
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130 | (2) |
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The pieces that make up the nucleus: Nucleons |
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130 | (1) |
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The pieces that make up the nucleon's parts: Quarks |
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131 | (1) |
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Looking into the Types of Particles |
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132 | (2) |
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Particles of force: Bosons |
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132 | (1) |
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Particles of matter: Fermions |
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133 | (1) |
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Gauge Bosons: Particles Holding Other Particles Together |
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134 | (1) |
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Exploring the Theory of Where Mass Comes From |
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135 | (2) |
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136 | (1) |
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Discovering the Higgs boson at the LHC |
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137 | (1) |
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From Big to Small: The Hierarchy Problem in Physics |
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137 | (4) |
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Chapter 9 Physics in Space: Considering Cosmology and Astrophysics |
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141 | (20) |
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The Enlightened Universe and the Birth of Modern Astrophysics |
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143 | (2) |
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Everything doesn't revolve around Earth |
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143 | (1) |
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Beholding the movements of heavenly bodies |
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144 | (1) |
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Introducing the Idea of an Expanding Universe |
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145 | (3) |
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Discovering that energy and pressure have gravity |
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145 | (2) |
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147 | (1) |
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Finding a Beginning: The Big Bang Theory |
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148 | (4) |
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Going to bat for the big bang: Cosmic microwave background radiation |
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149 | (2) |
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Understanding where the chemical elements came from |
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151 | (1) |
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Using Inflation to Solve the Universe's Problems of Flatness and Horizon |
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152 | (3) |
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The universe's issues: Too far and too flat |
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153 | (1) |
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Rapid expansion early on holds the solutions |
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154 | (1) |
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Dark Matter: The Source of Extra Gravity |
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155 | (1) |
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Dark Energy: Pushing the Universe Apart |
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155 | (3) |
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Stretching the Fabric of Space-Time into a Black Hole |
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158 | (5) |
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What goes on inside a black hole? |
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158 | (1) |
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What goes on at the edge of a black hole? |
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159 | (2) |
Part 3: Building String Theory: A Theory Of Everything |
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161 | (100) |
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Chapter 10 Early Strings and Superstrings: Unearthing the Theory's Beginnings |
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163 | (24) |
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Bosonic String Theory: The First String Theory |
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164 | (4) |
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Explaining the scattering of particles with early dual resonance models |
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164 | (2) |
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Exploring the first physical model: Particles as strings |
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166 | (1) |
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Bosonic string theory loses out to the Standard Model |
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167 | (1) |
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Why Bosonic String Theory Doesn't Describe Our Universe |
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168 | (5) |
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169 | (1) |
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169 | (1) |
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170 | (1) |
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25 space dimensions, plus 1 of time |
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171 | (2) |
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Supersymmetry Saves the Day: Superstring Theory |
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173 | (4) |
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Fermions and bosons coexist...sort of |
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173 | (1) |
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Double your particle fun: Supersymmetry hypothesizes superpartners |
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174 | (2) |
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Some problems get fixed, but the dimension problem remains |
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176 | (1) |
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Supersymmetry and Quantum Gravity in the Disco Era |
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177 | (3) |
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The graviton is found hiding in string theory |
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177 | (2) |
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The other supersymmetric gravity theory: Supergravity |
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179 | (1) |
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String theorists don't get no respect |
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179 | (1) |
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A Theory of Everything: The First Superstring Revolution |
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180 | (1) |
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But We've Got Five Theories |
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181 | (2) |
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182 | (1) |
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182 | (1) |
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182 | (1) |
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Two strings in one: Heterotic strings |
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182 | (1) |
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How to Fold Space: Introducing Calabi-Yau Manifolds |
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183 | (2) |
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String Theory Loses Steam |
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185 | (2) |
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Chapter 11 M-Theory and Beyond: Bringing String Theory Together |
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187 | (16) |
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Introducing the Unifying Theory: M-Theory |
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187 | (7) |
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Translating one string theory into another: Duality |
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188 | (4) |
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Using two dualities to unite five superstring theories |
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192 | (1) |
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The second superstring revolution begins: Connecting to the 11-dimensional theory |
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193 | (1) |
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Branes: Stretching Out a String |
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194 | (6) |
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The discovery of D-branes: Giving open strings something to hold on to |
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195 | (1) |
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Creating particles from p-branes |
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196 | (1) |
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Deducing that branes are required by M-theory |
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197 | (1) |
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Uniting D-branes and p-branes into one type of brane |
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198 | (1) |
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Using branes to explain black holes |
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199 | (1) |
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Getting stuck on a brane: Brane worlds |
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200 | (1) |
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Matrix Theory as a Potential M-Theory |
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200 | (3) |
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Chapter 12 Exploring Strings and Their Landscape |
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203 | (14) |
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Strings and Fields: String Field Theory |
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203 | (5) |
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Splitting and joining of strings and how to avoid infinities |
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204 | (2) |
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Trying to visualize how strings create loops |
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206 | (2) |
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String Theory Gets Surprised by Dark Energy |
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208 | (1) |
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Considering Proposals for Why Dimensions Sometimes Uncurl |
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209 | (2) |
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209 | (1) |
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Infinite dimensions: Randall-Sundrum models |
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210 | (1) |
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Understanding the Current Landscape: A Multitude of Theories |
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211 | (6) |
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The anthropic principle requires observers |
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212 | (2) |
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Disagreeing about the principle's value |
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214 | (3) |
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Chapter 13 Gaining Insights from the Holographic Principle |
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217 | (20) |
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217 | (5) |
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Creating optical holograms |
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218 | (1) |
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More bang for your buck: Encoding information in fewer dimensions |
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219 | (3) |
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Using Holograms to Understand Black Holes |
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222 | (4) |
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222 | (1) |
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223 | (1) |
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If it works for black holes, it works for me |
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224 | (2) |
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Considering AdS/CFT Correspondence |
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226 | (7) |
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227 | (1) |
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AdS space, or living in an M. C. Escher painting |
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227 | (4) |
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CFTs: conformal, but nonconformist |
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231 | (1) |
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Understanding quantum gravity through AdS/CFT correspondence |
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232 | (1) |
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Turning the Tables: Using Holography to Study Strongly Interacting Matter |
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233 | (4) |
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The force is strong when using AdS/CFT |
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233 | (2) |
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Cooking up a soup of quarks and gluons |
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235 | (2) |
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Chapter 14 Putting String Theory to the Test |
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237 | (24) |
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Understanding the Obstacles |
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238 | (2) |
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Testing an incomplete theory with indistinct predictions |
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238 | (1) |
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239 | (1) |
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240 | (2) |
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Finding the missing sparticles |
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240 | (1) |
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Testing implications of supersymmetry |
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241 | (1) |
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Testing Gravity from Extra Dimensions |
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242 | (2) |
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Checking the inverse-square law |
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242 | (1) |
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Searching for gravity waves to understand inflation |
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243 | (1) |
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Disproving String Theory Sounds Easier Than It Is |
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244 | (3) |
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244 | (1) |
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Could proton decay spell disaster? |
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245 | (1) |
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Seeking mathematical inconsistencies |
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246 | (1) |
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Bootstrapping Our Way into String Theory |
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247 | (1) |
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Looking for Evidence in the Cosmic Laboratory: Exploring the Universe |
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248 | (6) |
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Using outer space rays to amplify small events |
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249 | (3) |
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Analyzing dark matter and dark energy |
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252 | (1) |
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Detecting cosmic superstrings |
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253 | (1) |
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Looking for Evidence Closer to Home: Using Particle Accelerators |
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254 | (2) |
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Accelerating heavy ions at the RHIC |
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254 | (1) |
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255 | (1) |
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LHC finds a boson, but no superpartners yet |
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256 | (7) |
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Discovering the Higgs boson |
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257 | (1) |
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Looking for superpartners |
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258 | (3) |
Part 4: The Unseen Cosmos: String Theory On The Boundaries Of Knowledge |
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261 | (56) |
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Chapter 15 Making Space for Extra Dimensions |
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263 | (16) |
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264 | (1) |
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2-Dimensional Space: Exploring the Geometry of Flatland |
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265 | (2) |
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Euclidean geometry: Think back to high school geometry |
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265 | (1) |
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Cartesian geometry: Merging algebra and Euclidean geometry |
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266 | (1) |
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Three Dimensions of Space |
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267 | (5) |
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A straight line in space: Vectors |
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267 | (1) |
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Twisting 2-dimensional space in three dimensions: The Mobius strip |
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268 | (2) |
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More twists in three dimensions: Non-Euclidean geometry |
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270 | (2) |
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Four Dimensions of Space-Time |
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272 | (1) |
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Adding More Dimensions to Make a Theory Work |
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273 | (1) |
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Sending Space and Time on a Bender |
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274 | (1) |
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Are Extra Dimensions Really Necessary? |
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275 | (4) |
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Offering an alternative to multiple dimensions |
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276 | (1) |
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Weighing fewer dimensions against simpler equations |
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277 | (2) |
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Chapter 16 Our Universe - String Theory, Cosmology, and Astrophysics |
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279 | (18) |
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The Start of the Universe with String Theory |
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280 | (6) |
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What was before the bang? |
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280 | (2) |
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282 | (4) |
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Explaining Black Holes with String Theory |
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286 | (3) |
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String theory and the thermodynamics of a black hole |
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286 | (2) |
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String theory and the black hole information paradox |
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288 | (1) |
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The Evolution of the Universe |
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289 | (4) |
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The swelling continues: Eternal inflation |
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289 | (2) |
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The hidden matter and energy |
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291 | (2) |
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The Undiscovered Country: The Future of the Cosmos |
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293 | (1) |
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A universe of ice: The big freeze |
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293 | (1) |
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From point to point: The big crunch |
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294 | (1) |
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A new beginning: The big bounce |
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294 | (1) |
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Exploring a Finely Tuned Universe |
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294 | (3) |
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Chapter 17 Have Time, Will Travel |
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297 | (20) |
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Temporal Mechanics 101: How Time Flies |
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298 | (5) |
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The arrow of time: A one-way ticket |
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298 | (1) |
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Relativity, worldlines, and worldsheets: Moving through space-time |
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299 | (3) |
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Hawking's chronology protection conjecture: You're not going anywhere |
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302 | (1) |
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Slowing Time to a Standstill with Relativity |
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303 | (2) |
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Time dilation: Sometimes even the best watches run slow |
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303 | (1) |
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Black hole event horizons: An extra-slow version of slow motion |
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304 | (1) |
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General Relativity and Wormholes: Doorways in Space and Time |
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305 | (5) |
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Taking a shortcut through space and time with a wormhole |
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306 | (2) |
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Overcoming a wormhole's instability with negative energy |
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308 | (2) |
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Crossing Cosmic Strings to Allow Time Travel |
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310 | (1) |
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A Two-Timing Science: String Theory Makes More Time Dimensions Possible |
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310 | (3) |
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Adding a new time dimension |
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311 | (1) |
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Reflecting two-time physics onto a one-time universe |
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311 | (1) |
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Does two-time physics have any real applications? |
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312 | (1) |
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Sending Messages through Time |
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313 | (4) |
Part 5: What The Other Guys Say: Criticisms And Alternatives |
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317 | (48) |
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Chapter 18 Taking a Closer Look at the String Theory Controversy |
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319 | (20) |
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The String Wars: Outlining the Arguments |
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320 | (4) |
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50 years and counting: Framing the debate from the skeptic's point of view |
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321 | (2) |
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323 | (1) |
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Is String Theory Scientific? |
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324 | (5) |
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Argument No. 1: String theory explains nothing |
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324 | (1) |
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Argument No. 2: String theory explains too much |
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325 | (4) |
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Turning a Critical Eye on String Theorists |
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329 | (3) |
|
Hundreds of physicists just can't be wrong |
|
|
329 | (2) |
|
Holding the keys to the academic kingdom |
|
|
331 | (1) |
|
Does String Theory Describe Our Universe? |
|
|
332 | (3) |
|
Making sense of extra dimensions |
|
|
333 | (1) |
|
Space-time should be fluid |
|
|
333 | (1) |
|
The ever-elusive superpartners |
|
|
334 | (1) |
|
How finite is string theory? |
|
|
335 | (1) |
|
|
335 | (2) |
|
What about the extra dimensions? |
|
|
336 | (1) |
|
|
337 | (1) |
|
Does string theory need to be finite? |
|
|
337 | (1) |
|
Trying to Make Sense of the Controversy |
|
|
337 | (2) |
|
Chapter 19 Loop Quantum Gravity: String Theory's Biggest Competitor |
|
|
339 | (10) |
|
Taking the Loop: Introducing Another Road to Quantum Gravity |
|
|
340 | (3) |
|
The great background debate |
|
|
340 | (1) |
|
|
341 | (2) |
|
Making Predictions with Loop Quantum Gravity |
|
|
343 | (1) |
|
|
343 | (1) |
|
Black holes contain only so much space |
|
|
343 | (1) |
|
Gamma ray burst radiation travels at different speeds |
|
|
344 | (1) |
|
Finding Favor and Flaw with Loop Quantum Gravity |
|
|
344 | (2) |
|
The benefit of a finite theorem |
|
|
344 | (1) |
|
Spending some time focusing on the flaws |
|
|
345 | (1) |
|
So Are These Two Theories the Same with Different Names? |
|
|
346 | (3) |
|
Chapter 20 Considering Other Ways to Explain the Universe |
|
|
349 | (16) |
|
Taking Other Roads to Quantum Gravity |
|
|
350 | (4) |
|
CDT: If you've got the time, I've got the space |
|
|
351 | (1) |
|
Quantum Einstein gravity: Too small to tug |
|
|
352 | (1) |
|
Quantum graphity: Disconnecting nodes |
|
|
352 | (1) |
|
Tensor models: gluing the space-time together |
|
|
353 | (1) |
|
Newton and Einstein Don't Make All the Rules: Modifying the Law of Gravity |
|
|
354 | (6) |
|
DSR: Twice as many limits as ordinary relativity |
|
|
355 | (1) |
|
MOND: Disregarding dark matter |
|
|
355 | (1) |
|
VSL: Light used to travel even faster |
|
|
356 | (2) |
|
MOG: The bigger the distance, the greater the gravity |
|
|
358 | (1) |
|
Massive gravity and bimetric theory: making the graviton heavy |
|
|
359 | (1) |
|
Rewriting the Math Books and Physics Books at the Same Time |
|
|
360 | (3) |
|
Compute this: Quantum information theory |
|
|
360 | (1) |
|
Looking at relationships: Twistor theory |
|
|
361 | (1) |
|
Uniting mathematical systems: Noncommutative geometry |
|
|
362 | (1) |
|
Mathematics All the Way Down: Are We Living in a Simulation? |
|
|
363 | (2) |
Part 6: The Part Of Tens |
|
365 | (8) |
|
Chapter 21 Ten Tests for a Theory of Quantum Gravity |
|
|
367 | (6) |
|
|
368 | (1) |
|
Compute Quantum Corrections |
|
|
368 | (1) |
|
Describe How Gravity and Matter Interact |
|
|
368 | (1) |
|
|
369 | (1) |
|
Explain What Happens When Someone Enters a Black Hole |
|
|
369 | (1) |
|
Explain Whether Singularities Are Allowed |
|
|
369 | (1) |
|
Explain the Birth and Death of Black Holes |
|
|
370 | (1) |
|
Explain the Holographic Principle |
|
|
370 | (1) |
|
Provide Testable Predictions |
|
|
371 | (1) |
|
Describe Its Own Limitations |
|
|
371 | (2) |
Index |
|
373 | |