A plane electromagnetic wave propagating along x-direction can have the following pairs of E and B
a) Bx, Ey
b) Ex, By
c) Ey, Bz
d) Ez, By
Answer: The correct answers are the options,
c) Ey, Bz
d) Ez, By
Solution: The direction of propagation of electromagnetic waves is perpendicular with the magnetic field vector(B) and also with the electric field vector(E). Therefore, the electromagnetic wave that is propagating along the x-direction, will have electric and magnetic field vectors either in Y-direction or 2-direction.