Question

Maxwell's equations in free space and linear isotropic media

Answer 1

Answer:

Electromagnetic theroy is concerned with the study of charges at rest and at motion producing currents. , Maxwell’s equations are wave equations. They can be reduced to vector equations similar to the standard wave equation arising in acoustics. However, electromagnetic waves may propagate in the empty space while mechanical waves need a material media. The latter are particular solutions of the conservation equations in thermomechanics. In solid we refer to mechanical vibrations and in fluids, besides the important example of the above mentioned acoustic waves, there are also gravity waves or capillary waves, among others. In all cases, an important feature of waves is its finite velocity of propagation.

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