## Classical Electrodynamics |

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Page 140

If V . B = 0 everywhere , B must be the curl of some vector field A ( x ) ,

vector potential , ( B ( x ) = V * A ( x ) ( 5 . 27 ) We have , in fact , already written B

in this form ( 5 . 16 ) . Evidently , from ( 5 . 16 ) , the general form of A is A ( x ) = 1

...

If V . B = 0 everywhere , B must be the curl of some vector field A ( x ) ,

**called**thevector potential , ( B ( x ) = V * A ( x ) ( 5 . 27 ) We have , in fact , already written B

in this form ( 5 . 16 ) . Evidently , from ( 5 . 16 ) , the general form of A is A ( x ) = 1

...

Page 181

35 ) is

transformations is

Q is

35 ) is

**called**a gauge transformation , and the invariance of the fields under suchtransformations is

**called**gauge invariance . The relation ( 6 . 36 ) between A andQ is

**called**the Lorentz condition . To see that potentials can always be found to ...Page 370

The unshaded interior of the cone represents the past and the future , while the

shaded region outside the cone is

the light cone is said to have a time - like ( spacelike ) separation from the origin .

The unshaded interior of the cone represents the past and the future , while the

shaded region outside the cone is

**called**“ elsewhere . " A point inside ( outside )the light cone is said to have a time - like ( spacelike ) separation from the origin .

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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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