Photoelectric effect supports quantum nature of light because

Options

A. there is minimum frequency of light below which no photoelectrons are emitted
B. the maximum KE of photoelectrons depends only on the frequency of light and not on its intensity
C. even when the metal surface is faintly illuminated by light of wavelength less than the threshold wavelength, the photoelectrons leave the surface immediately
D. electric charge of photoelectrons is quantized

Answer

A, B, C

Explanation

Existence of cut off frequency and photoemission takes place even when intensity is low.