Which of the following experimental results for the photoelectric effect suggest

Question

Which of the following experimental results for the photoelectric effect suggests that light can display particle-like behavior?

A.The number of emitted electrons is proportional to the light intensity.

B.The kinetic energy of emitted electrons is independent of the light intensity.

C.No electrons are emitted unless the frequency is above a threshold frequency 0.

D.At very low intensity the incident light is still able to eject electrons from a material if its frequency is above the threshold frequency.

1.A

2.D

3.C

4.B

Explanation / Answer

D

The fact that at very low intensity the incident light is still able to eject electrons,
if its frequency is above the threshold frequency, suggests that the energy of the
light can be concentrated in a region of atomic dimensions at the surface of the
solid. This suggests particle-like behavior

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