Physics Electromagnetic Waves Level: Misc Level

The amplitude of the elecric field component of an electromagnetic wave is increased from E to 4 E. What is the corresponding change in the intensity of the wave?

(a) The intensity is unchanged by the increase in E

(b) The intensity increases by a factor of 16

(c) The intensity increases by a factor of 4

(d) The intensity decreases by a factor of 4

(e) The intensity decreases by a factor of 16