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A comprehensive, modern introduction to electromagnetism
This graduate-level physics textbook provides a comprehensive treatment of the basic principles and phenomena of classical electromagnetism. While many electromagnetism texts use the subject to teach mathematical methods of physics, here the emphasis is on the physical ideas themselves. Anupam Garg distinguishes between electromagnetism in vacuum and that in material media, stressing that the core physical questions are different for each. In vacuum, the focus is on the fundamental content of electromagnetic laws, symmetries, conservation laws, and the implications for phenomena such as radiation and light. In material media, the focus is on understanding the response of the media to imposed fields, the attendant constitutive relations, and the phenomena encountered in different types of media such as dielectrics, ferromagnets, and conductors. The text includes applications to many topical subjects, such as magnetic levitation, plasmas, laser beams, and synchrotrons.
Classical Electromagnetism in a Nutshell is ideal for a yearlong graduate course and features more than 300 problems, with solutions to many of the advanced ones. Key formulas are given in both SI and Gaussian units; the book includes a discussion of how to convert between them, making it accessible to adherents of both systems.
- Offers a complete treatment of classical electromagnetism
- Emphasizes physical ideas
- Separates the treatment of electromagnetism in vacuum and material media
- Presents key formulas in both SI and Gaussian units
- Covers applications to other areas of physics
- Includes more than 300 problems
Industry Reviews
| Preface | p. xv |
| List of symbols | p. xxi |
| Suggestions for using this book | p. xxxi |
| Introduction | p. 1 |
| The field concept | p. 1 |
| The equations of electrodynamics | p. 2 |
| A lightspeed survey of electromagnetic phenomena | p. 7 |
| SI versus Gaussian | p. 10 |
| Review of mathematical concepts | p. 18 |
| Vector algebra | p. 18 |
| Derivatives of vector fields | p. 25 |
| Integration of vector fields | p. 30 |
| The theorems of Stokes and Gauss | p. 32 |
| Fourier transforms, delta functions, and distributions | p. 37 |
| Rotational transformations of vectors and tensors | p. 45 |
| Orthogonal curvilinear coordinates | p. 51 |
| Electrostatics in vacuum | p. 55 |
| Coulomb's law | p. 55 |
| The electrostatic potential | p. 57 |
| Electrostatic energy | p. 58 |
| Differential form of Coulomb's law | p. 63 |
| Uniqueness theorem of electrostatics | p. 65 |
| Solving Poisson's equation: a few examples | p. 68 |
| Energy in the electric field | p. 71 |
| The Multipole expansion | p. 73 |
| Charge distributions in external fields | p. 80 |
| Magnetostatics in vacuum | p. 82 |
| Sources of magnetic field | p. 82 |
| The law of Biot and Savart | p. 89 |
| Differential equations of magnetostatics; Ampere's law | p. 93 |
| The vector potential | p. 101 |
| Gauge invariance | p. 105 |
| ∇ B and ∇ × B for a point dipole | p. 108 |
| Magnetic multipoles | p. 112 |
| Induced electromagnetic fields | p. 114 |
| Induction | p. 114 |
| Energy in the magnetic field-Feynman's argument | p. 117 |
| Energy in the magnetic field-standard argument | p. 120 |
| Inductance | p. 121 |
| The Ampere-Maxwell law | p. 125 |
| Potentials for time-dependent fields | p. 128 |
| Symmetries and conservation laws | p. 132 |
| Discrete symmetries of the laws of electromagnetism | p. 132 |
| Energy flow and the Poynting vector | p. 137 |
| Momentum conservation | p. 140 |
| Angular momentum conservation* | p. 144 |
| Relativity at low speeds | p. 148 |
| Electromagnetic mass* | p. 150 |
| Electromagnetic waves | p. 152 |
| The wave equation for E and B | p. 152 |
| Plane electromagnetic waves | p. 154 |
| Monochromatic plane waves and polarization | p. 156 |
| Nonplane monochromatic waves; geometrical optics* | p. 160 |
| Electromagnetic fields in a laser beam* | p. 165 |
| Partially polarized (quasimonochromatic) Hght* | p. 168 |
| Oscillator representation of electromagnetic waves | p. 171 |
| Angular momentum of the free electromagnetic field* | p. 174 |
| Interference phenomena | p. 178 |
| Interference and diffraction | p. 178 |
| Fresnel diffraction | p. 182 |
| Fraunhofer diffraction | p. 186 |
| Partially coherent light | p. 187 |
| The Hanbury-Brown and Twiss effect; intensity interferometry* | p. 191 |
| The Pancharatnam phase* | p. 195 |
| The electromagnetic field of moving charges | p. 200 |
| Green's function for the wave equation | p. 200 |
| Fields of a uniformly moving charge | p. 204 |
| Potentials of an arbitrarily moving charge-the Lienard-Wiechert solutions | p. 207 |
| Electromagnetic fields of an arbitrarily moving charge | p. 210 |
| Radiation from accelerated charges: qualitative discussion | p. 214 |
| Radiation from localized sources | p. 217 |
| General frequency-domain formulas for fields | p. 217 |
| Far-zone fields | p. 219 |
| Power radiated | p. 223 |
| The long-wavelength electric dipole approximation | p. 227 |
| Higher multipoles* | p. 229 |
| Antennas | p. 233 |
| Near-zone fields | p. 237 |
| Angular momentum radiated* | p. 239 |
| Radiation reaction | p. 241 |
| Motion of charges and moments in external fields | p. 245 |
| The Lorentz force law | p. 245 |
| Motion in a static uniform electric field | p. 246 |
| Motion in a static uniform magnetic field | p. 248 |
| Motion in crossed E and B fields; E < B | p. 251 |
| Motion in a time-dependent magnetic field; the betatron | p. 255 |
| Motion in a quasiuniform static magnetic field-guiding center drift* | p. 257 |
| Motion in a slowly varying magnetic field-the first adiabatic invariant* | p. 261 |
| The classical gyromagnetic ratio and Larmor's theorem | p. 264 |
| Precession of moments in time-dependent magnetic fields* | p. 268 |
| Action formulation of electromagnetism | p. 273 |
| Charged particle in given field | p. 273 |
| The free field | p. 276 |
| The interacting system of fields and charges | p. 279 |
| Gauge invariance and charge conservation | p. 283 |
| Electromagnetic fields in material media | p. 285 |
| Macroscopic fields | p. 286 |
| The macroscopic charge density and the polarization | p. 289 |
| The macroscopic current density and the magnetization | p. 293 |
| Constitutive relations | p. 297 |
| Energy conservation | p. 300 |
| Electrostatics around conductors | p. 302 |
| Electric fields inside conductors, and at conductor surfaces | p. 303 |
| Theorems for electrostatic fields | p. 306 |
| Electrostatic energy with conductors; capacitance | p. 308 |
| The method of images | p. 313 |
| Separation of variables and expansions in basis sets | p. 320 |
| The variational method* | p. 329 |
| The relaxation method | p. 334 |
| Microscopic electrostatic field at metal surfaces; work function and contact potential* | p. 339 |
| Electrostatics of dielectrics | p. 344 |
| The dielectric constant | p. 344 |
| Boundary value problems for linear isotropic dielectrics | p. 347 |
| Depolarization | p. 350 |
| Thermodynamic potentials for dielectrics | p. 354 |
| Force on small dielectric bodies | p. 360 |
| Models of the dielectric constant | p. 361 |
| Magnetostatics in matter | p. 370 |
| Magnetic permeability and susceptibility | p. 370 |
| Thermodynamic relations for magnetic materials | p. 371 |
| Diamagnetism | p. 375 |
| Paramagnetism | p. 378 |
| The exchange interaction; ferromagnetism | p. 378 |
| Free energy of ferromagnets | p. 382 |
| Ferromagnetic domain walls* | p. 391 |
| Hysteresis in ferromagnets | p. 394 |
| Demagnetization | p. 397 |
| Superconductors* | p. 399 |
| Ohm's law, emf, and electrical circuits | p. 404 |
| Ohm's law | p. 405 |
| Electric fields around current-carrying conductors-a solvable example* | p. 407 |
| van der Pauw's method* | p. 409 |
| The Van de Graaff generator | p. 412 |
| The thermopile | p. 413 |
| The battery | p. 414 |
| Lumped circuits | p. 417 |
| The telegrapher's equation* | p. 422 |
| The ac generator | p. 424 |
| Frequency-dependent response of materials | p. 427 |
| The frequency-dependent conductivity | p. 427 |
| The dielectric function and electric propensity | p. 429 |
| General properties of the ac conductivity* | p. 431 |
| Electromagnetic energy in material media* | p. 435 |
| Drude-Lorentz model of the dielectric response | p. 437 |
| Frequency dependence of the magnetic response* | p. 441 |
| Quasistatic phenomena in conductors | p. 443 |
| Quasistatic fields | p. 443 |
| Variable magnetic field: eddy currents and the skin effect in a planar geometry | p. 445 |
| Variable magnetic field: eddy currents and the skin effect in finite bodies* | p. 450 |
| Variable electric field, electrostatic regime | p. 455 |
| Variable electric field, skin-effect regime | p. 457 |
| Eddy currents in thin sheets, Maxwell's receding image construction, and maglev* | p. 459 |
| Motion of extended conductors in magnetic fields* | p. 465 |
| The dynamo* | p. 467 |
| Electromagnetic waves in insulators | p. 470 |
| General properties of EM waves in media | p. 470 |
| Wave propagation velocities | p. 472 |
| Reflection and refraction at a fiat interface (general case) | p. 475 |
| More reflection and refraction (both media transparent and nonmagnetic) | p. 479 |
| Reflection from a nonmagnetic opaque medium* | p. 483 |
| Electromagnetic waves in and near conductors | p. 487 |
| Plasma oscillations | p. 487 |
| Dispersion of plasma waves* | p. 488 |
| Transverse EM waves in conductors | p. 490 |
| Reflection of light from a metal | p. 492 |
| Surface plasmons* | p. 493 |
| Waveguides | p. 496 |
| Resonant cavities | p. 502 |
| Scattering of electromagnetic radiation | p. 505 |
| Scattering terminology | p. 505 |
| Scattering by free electrons | p. 506 |
| Scattering by bound electrons | p. 508 |
| Scattering by small particles | p. 510 |
| Scattering by dilute gases, and why the sky is blue | p. 512 |
| Raman scattering | p. 515 |
| Scattering by liquids and dense gases* | p. 516 |
| Formalism of special relativity | p. 524 |
| Review of basic concepts | p. 524 |
| Four-vectors | p. 532 |
| Velocity, momentum, and acceleration four-vectors | p. 537 |
| Four-tensors | p. 540 |
| Vector fields and their derivatives in space-time | p. 543 |
| Integration of vector fields* | p. 544 |
| Accelerated observers* | p. 548 |
| Special relativity and electromagnetism | p. 553 |
| Four-current and charge conservation | p. 553 |
| The four-potential | p. 556 |
| The electromagnetic field tensor | p. 556 |
| Covariant form of the laws of electromagnetism | p. 559 |
| The stress-energy tensor | p. 561 |
| Energy-momentum conservation in special relativity | p. 564 |
| Angular momentum and spin* | p. 565 |
| Observer-dependent properties of light | p. 567 |
| Motion of charge in an electromagnetic plane wave* | p. 572 |
| Thomas precession* | p. 576 |
| Radiation from relativistic sources | p. 581 |
| Total power radiated | p. 581 |
| Angular distribution of power | p. 584 |
| Synchrotron radiation-qualitative discussion | p. 588 |
| Full spectral, angular, and polarization distribution of synchrotron radiation* | p. 589 |
| Spectral distribution of synchrotron radiation* | p. 592 |
| Angular distribution and polarization of synchrotron radiation* | p. 595 |
| Undulators and wigglers* | p. 597 |
| Spherical harmonics | p. 605 |
| Bessel Junctions | p. 617 |
| Time averages of bilinear quantities in electrodynamics | p. 625 |
| Caustics | p. 627 |
| Airy functions | p. 633 |
| Power spectrum of a random function | p. 637 |
| Motion in the earth's magnetic field-the Stormer problem | p. 643 |
| Alternative proof of Maxwell's receding image construction | p. 651 |
| Bibliography | p. 655 |
| Index | p. 659 |
| Table of Contents provided by Ingram. All Rights Reserved. |
ISBN: 9780691130187
ISBN-10: 0691130183
Series: In a Nutshell
Published: 19th June 2012
Format: Hardcover
Language: English
Number of Pages: 712
Audience: College, Tertiary and University
Publisher: Princeton University Press
Country of Publication: US
Dimensions (cm): 25.4 x 17.7 x 254
Weight (kg): 1.59
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