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Simple Nature - Light and Matter

Simple Nature - Light and Matter

Simple Nature - Light and Matter

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5.5 More About Heat Engines . . . . . . . . . . . . . 328Problems . . . . . . . . . . . . . . . . . . . . . . 3356 Waves6.1 Free Waves . . . . . . . . . . . . . . . . . . . 340Wave motion, 340.—Waves on a string, 346.—Sound <strong>and</strong> lightwaves, 349.—Periodic waves, 351.—The Doppler effect, 354.6.2 Bounded Waves . . . . . . . . . . . . . . . . . 360Reflection, transmission, <strong>and</strong> absorption, 360.—Quantitative treatmentof reflection, 365.—Interference effects, 368.—Interferenceeffects, 368.—Interference effects, 368.—Waves bounded on bothsides, 370.Problems . . . . . . . . . . . . . . . . . . . . . . 3777 Relativity7.1 Time Is Not Absolute . . . . . . . . . . . . . . . 381The correspondence principle, 381.—Causality, 381.—Time distortionarising from motion <strong>and</strong> gravity, 382.7.2 Distortion of Space <strong>and</strong> Time . . . . . . . . . . . . 384The Lorentz transformation, 384.—The γ factor, 389.—The universalspeed c, 394.—No action at a distance, 398.—The light cone,401.—⋆ The spacetime interval, 401.—⋆ Four-vectors <strong>and</strong> the innerproduct, 406.—⋆ Doppler shifts of light <strong>and</strong> addition of velocities,407.7.3 Dynamics . . . . . . . . . . . . . . . . . . . . 410Momentum, 410.—Equivalence of mass <strong>and</strong> energy, 413.—⋆ Theenergy-momentum four-vector, 418.—⋆ Proofs, 420.7.4 ⋆ General Relativity . . . . . . . . . . . . . . . . 423Our universe isn’t Euclidean, 423.—The equivalence principle, 426.—Black holes, 430.—Cosmology, 433.Problems . . . . . . . . . . . . . . . . . . . . . . 437Exercises . . . . . . . . . . . . . . . . . . . . . . 4448 Atoms <strong>and</strong> Electromagnetism8.1 The Electric Glue . . . . . . . . . . . . . . . . . 453The quest for the atomic force, 454.—Charge, electricity <strong>and</strong> magnetism,455.—Atoms, 460.—Quantization of charge, 465.—The electron,468.—The raisin cookie model of the atom, 472.8.2 The Nucleus . . . . . . . . . . . . . . . . . . . 474Radioactivity, 474.—The planetary model, 477.—Atomic number,481.—The structure of nuclei, 486.—The strong nuclear force, alphadecay <strong>and</strong> fission, 490.—The weak nuclear force; beta decay,493.8.3 Fusion. . . . . . . . . . . . . . . . . . . . . . 4958.4 Nuclear Energy <strong>and</strong> Binding Energies . . . . . . . . 4968.5 Biological Effects of Ionizing Radiation . . . . . . . . 498Units used to measure exposure, 498.—Effects of exposure, 499.—Effects of high doses of radiation, 500.—Effects of low doses radiation,500.—The green case for nuclear power, 501.Contents 9

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