Monochromatic light falls on a metal surface and electrons are ejected. If the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons?
A) greater rate; greater maximum energy.
B) same rate; same maximum energy.
C) same rate; greater maximum energy.
D) greater rate; same maximum energy.

Question

Quizplus · Accepted Answer

Increasing the intensity of monochromatic light increases the number of photons hitting the metal surface per unit time, which increases the rate of electron ejection. However, the maximum energy of the ejected electrons is determined by the frequency of the light, not its intensity, and remains unchanged.

Monochromatic Light Falls on a Metal Surface and Electrons Are