At every instant the ratio of the magnitude of the electric to the magnetic field in an electromagnetic wave in vacuum is equal to
A) the speed of radio waves.
B) the speed of light.
C) the speed of gamma rays.
D) all of the above.
E) only (a) and (b) above.

Question

Quizplus · Accepted Answer

The ratio of the magnitude of the electric field to the magnetic field in an electromagnetic wave in vacuum is equal to the speed of light, which is the same for all electromagnetic waves, including radio waves and gamma rays.

At Every Instant the Ratio of the Magnitude of the Electric