Question

Choose the answer that explains the photoelectric effect.

Metallic plates emit protons only when light of a certain minimum frequency shines on them.
Metallic plates emit electrons when the cumulative effect of light causes electron movement.
Metallic plates emit electrons only when light of a certain maximum frequency accumulates energy.
Metallic plates emit electrons only when light of a certain minimum frequency shines on them.

Answer 1

Answer:

option 4 is correct

(4) Metallic plates emit electrons only when light of a certain minimum frequency shines on them.