Question

The solar panels used by Mark function because of the photoelectric effect. Light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. At night on Mars, no light will fall on the solar cells and no electric current will be generated. According to your notes, what type of light is typically needed to cause the photoelectric effect?

A)Visible

B)Ultraviolet

C)Infrared

Answer 1

friend please verify the answer i'm not too much sure but according to me the visible is needed to caused the photoelectric effect.

Answer 2

A) Ultraviolet

Step-by-step explanation:

As per Einstein equation of photoelectric effect we know that

`h\\u = \phi + KE`

here we know that

`\\u` = frequency of incident photons

`\phi` = work function of metal

`KE` = kinetic energy of electrons

now we know that when light of sufficient energy falls on the solar plates then electrons will come out and current flow in the solar panel

So here out of all three option maximum energy is for ultraviolet so we need ultraviolet light for the phenomenon of photoelectric effect.