Question: A plane electromagnetic wave propagating along y-direction can have the following pair of electric field $(\vec{E})$ and magnetic field $(\vec{B})$ components.
(1) $\mathrm{E}_{\mathrm{y}}, \mathrm{B}_{\mathrm{y}}$ or $\mathrm{E}_{\mathrm{z}}, \mathrm{B}_{\mathrm{z}}$
(2) $\mathrm{E}_{\mathrm{y}}, \mathrm{B}_{\mathrm{x}}$ or $\mathrm{E}_{\mathrm{x}}, \mathrm{B}_{\mathrm{y}}$
(3) $\mathrm{E}_{\mathrm{x}}, \mathrm{B}_{\mathrm{z}}$ or $\mathrm{E}_{\mathrm{z}}, \mathrm{B}_{\mathrm{x}}$
(4) $\mathrm{E}_{\mathrm{x}}, \mathrm{B}_{\mathrm{y}}$ or $\mathrm{E}_{\mathrm{y}}, \mathrm{B}_{\mathrm{x}}$
Correct Option: , 3
Solution:
(3)
