## Classical Electrodynamics |

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Page 211

32 ) • dk lo If an energy density is associated with the magnitude of the wave ( or

its absolute square ) , it is clear that in this approximation the transport of energy

occurs with the group

32 ) • dk lo If an energy density is associated with the magnitude of the wave ( or

its absolute square ) , it is clear that in this approximation the transport of energy

occurs with the group

**velocity**, since that is the rate at which the pulse travels ...Page 331

where we have introduced a vectorial Alfvén

equation ( 10 . 69 ) for v , is somewhat involved , but it allows simple solutions for

waves propagating parallel or perpendicular to the magnetic field direction .

where we have introduced a vectorial Alfvén

**velocity**: ( 10 . 70 ) 4072 The waveequation ( 10 . 69 ) for v , is somewhat involved , but it allows simple solutions for

waves propagating parallel or perpendicular to the magnetic field direction .

Page 340

107 ) v , ~ 34 % Up From the definition of ky we see that for such wave numbers

the phase

, the rms thermal

107 ) v , ~ 34 % Up From the definition of ky we see that for such wave numbers

the phase

**velocity**is much larger than , and the group**velocity**much smaller than, the rms thermal

**velocity**( u2 ) % . As the wave number increases towards kp ...### What people are saying - Write a review

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### Contents

Introduction to Electrostatics | 1 |

References and suggested reading | 50 |

Multipoles Electrostatics of Macroscopic Media | 98 |

Copyright | |

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acceleration angle angular applied approximation assumed atomic average axis becomes boundary conditions calculate called Chapter charge charged particle classical coefficients collisions compared component conducting Consequently consider constant coordinates cross section cylinder defined density dependence derivative determine dielectric dimensions dipole direction discussed distance distribution effects electric field electromagnetic electron electrostatic energy equal equation example expansion expression factor force frame frequency function given gives incident inside integral involved light limit Lorentz loss magnetic magnetic field magnetic induction magnitude mass means momentum motion moving multipole normal observation obtain origin parallel particle physical plane plasma polarization position potential problem properties radiation radius region relation relative relativistic result satisfy scalar scattering shown in Fig shows side solution space sphere spherical surface transformation unit vanishes vector velocity volume wave written