Question

A photocell shows photoelectric effect when green light shines on it. Which of the following is correct if a green light is replaced by a blue light?

Electron emission would get stopped.

Electrons are emitted with more velocity.

Electrons are emitted with less velocity.

Electrons are emitted with same velocity.

D?

Answer 1

[AI-generated answer — Explain Bot]

Yes, option D, "Electrons are emitted with the same velocity," is correct if a green light is replaced by a blue light in a photocell. The photoelectric effect is the emission of electrons when light of a certain frequency, called the threshold frequency, shines on a material. When electrons are emitted, they are given a specific kinetic energy and velocity that depends on the energy of the photons in the incident light. The color or frequency of the light does not affect the velocity of the emitted electrons. Thus, regardless of whether the light is green or blue, the emitted electrons will have the same velocity.