Question

In the photoelectric effect, the maximum speed of the electrons emitted by a metal surface when it is illuminated by light depends on which of the following?

I. Intensity of the light

II. Frequency of the light

III. Nature of the photoelectric surface

(A) I only 

(B) III only 

(C) I and II only 

(D) II and III only 

(E) I, II, and III

Answer 1

The correct option is: (D) II and III only 

Explanation:

This is explained in question 16. K is based on the work function (which is based on the nature of the surface) and K is also based on the frequency of the incoming light.