Question

Electromagnetic wave consists of periodically oscillating electric and magnetic vectors

• A. In mutually perpendicular planes but vibrating with phase difference of $\pi$
• B. In mutually perpendicular planes but vibrating with a phase difference of $\frac{\pi }{2}$
• C. In randomly oriented planes but vibrating in phase.
• D. In mutually perpendicular planes but vibrating in a phase

Answer 1

The correct option is D In mutually perpendicular planes but vibrating in a phase

Electric vector and magnetic vector propagate in planes perpendicular to each other.

Phase difference refers to the time difference and since there exists no time difference between the peaks of each vector, their phase difference is $0$.