Question

Photoelectric effect supports the quantum nature of light because:

• A. There is minimum frequency of light above which no photo electrons are emitted
• B. The maximum kinetic energy of photoelectrons depends on both frequency and intensity of light
• C. Even when a metal surface is faintly illuminated, the photoelectrons does not leave the surface immediately
• D. The maximum K.E. of photo electrons depends only on the frequency of light and not on intensity

Answer 1

Answer: (D)

The maximum K.E. of photo electrons depends only on the frequency of light and not on intensity

$hv=h{v}_0+K.E$
As frequency v is increased, K.E of emitted electron also increases, but with increase in intensity the photo electric current increases.

So, the correct answer is D.