Q. The electric field of plane electromagnetic wave in vacuum is represented by ${\overrightarrow{\mathbf{E}}}_{x} = 0;$ ${\overrightarrow{\mathbf{E}}}_{y} = 0.5\cos{\left\lbrack 2\pi \times 10^{8}(t - x/c) \right\rbrack:{\overrightarrow{\mathbf{E}}}_{\mathcal{z}} = 0}$ What is the direction of propagation of electromagnetic waves?
A) Along $x - \mathcal{z}$ direction
B) Along $y$-direction
C) Along $x$-direction
D) A long $y - \mathcal{z}$ direction
Explanation
(c) Equation second shows that the electromagnetic wave travels along the positive $x$-axis
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.