Question

Write the relation between the following:
(a) Direction of propagation and directions oscillation of the electric and magnetic field vectors in an electromagnetic wave.
(b) Velocity of the electormagnetic wave in vacuum and the permeability and permittivity of free space.

Answer 1

(a) The direction of propagation of electro-
magnetic wave is given by the direction of cross
product of electric field vector `vecE` and magnetic
field vector `vecB`, i.e., direction of `(vecExxvecB)`.
(b) Velocity of electromagnetic wave in vacuum
is `c=1/(sqrt(mu_0 in_0))`