Photoelectric Effect-Assertion Reasoning

Question

Two statements are given choose the most appropriate option-

A. Photoelectric effect will not be observed if energy of incident radiation is less than work function of metals.

R.If the energy of incident radiation is equal to work function of metal then kinetic energy of photo electrons is zero.

1. Both statements are correct and R is correct explanation of A.

2.Both statements are correct but R is not correct explanation of A.

3. Statement A is incorrect but R is correct.

4. Statement A is correct but R is incorrect.

Answer 1

Correct option is (4) Statement A is correct but R is incorrect

A metal surface does not emit electron if the energy of incident is less than photoelectric work function of the metal.