Question

What is photoelectric effect? State and explain its characteristics.

Answer 1

Dear Kavyashri,

◆ Photoelectric effect -
- Photoelectric effect is the emission of electrons or other free carriers due to absorption of electromagnetic radiation by the material.

# Characteristics of photoelectric effect -
1) Threshold frequency is variable for different metals.
2) The process is instantaneous.
3) Current produced is directly proportional to light intensity.
4) Stopping potential is directly proportional to threshold frequency.
5) K.E. of emitted electron is directly proportional to frequency of light.


Hope you understand..

Answer 2

Photoelectric efftct

It is the phenomenon of ejection of electrons by certain metal when light of suitable frequency strike on them.

Characteristics

a) There is no time lag between the striking of light beam and the ejection of electrons from the metal.

b) The number of electrons ejected is proportional to the intensity or brightness of light.

c) The kinetic energy of the ejected electrons id directly porpotional to the frequency of the light used.