Light striking a metal surface causes electrons to be emitted from the metal via

Question

Light striking a metal surface causes electrons to be emitted from the metal via the photoelectric effect.
In a particular experiment to study the photoelectric effect, the frequency of the incident light and the temperature of the metal are held constant. Assuming that the light incident on the metal surface causes electrons to be ejected from the metal, what happens if the intensity of the incident light is increased?
Check all that apply.
The work function of the metal decreases.
The number of electrons emitted from the metal per second increases.
The maximum speed of the emitted electrons increases.
The stopping potential increases.

Explanation / Answer

The key is the frequency being held constant. Because of that, the only thing that will change is the the number of electrons emitted per second will increase. Their speed will not increase, nor will the stopping potential increase. Only changing the frequency of the light can do that. The work function will not change if the temperature is constant.

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