a. A homogeneous electric field of intensity E occupies the space between
infinite planes AB and A′B′, the distance between which is d. This field was
formed by the superposition of two plane electromagnetic waves. Determine
these waves if the electric field strength E is parallel to the planes.
b. What electromagnetic waves can be decomposed into the magnetic field of
induction B, concentrated between the planes AB and A′B′ ? The magnetic
field induction B is parallel to the planes.