Chapter 27, Problem 2STP

To determine

To Choose: The correct option.

Answer to Problem 2STP

Option D

Explanation of Solution

Introduction:

When a beam of light falls on the metal surface, the electrons can be ejected from its surface. This is known as Photoelectric effect.

A metal contains freely bound electrons. Work function is the minimum energy of the radiation which is required to remove these most weakly bound electrons from the surface of a metal. Work function of a metal is also referred to as threshold energy. The frequency of the radiation having energy equal to threshold energy is called threshold frequency.

Conclusion:

Hence, option D is correct.