Number of photoelectrons emitted per second is proportional to:

Concept:

Keeping the frequency constant of incident radiation,

• The number of photoelectrons emitted per second is proportional to the intensity of incident light .This relationship is known as the photoelectric effect.
• According to the photoelectric effect, when light of a certain frequency is incident on a metal surface, electrons are emitted from the metal surface.
• The number of electrons emitted is proportional to the intensity of the incident light.

This relationship is expressed by the equation:

I = K *I₀

Where I is the number of photoelectrons emitted per second, I₀ is the intensity of the incident light, and K is a proportionality constant known as the photoelectric constant.

This equation shows that the number of photoelectrons emitted per second increases with increasing  intensity of the incident light. However, the maximum kinetic energy of the photoelectrons is only dependent on the frequency of the incident light, and is independent of the intensity of the light.

The correct answer is option (1)