Question

How can you explain photoelectric effect with the help of light radiations? ​

Answer 1

Photoelectric effect:

• when a photon with a sufficient frequency hits a metal surface, the electron in the metal(generally alkali metals) surface will be ejected or emitted out
• the minimum frequency to eject the electron is known as threshold frequency(v₀) to break the electrostatic forces b/w electron and nucleus
• v₀ varies from metal to metal
• the more the V₀, more will be the kinetic energy of ejected electron

According to the v₀, 3 cases happens

1. when threshold frequency (v₀) > incident frequency(v), photo electric effect happens, Kinetic energy(KE)>0
2. when v₀=v, photoelectric effect happens, KE=0
3. when v₀<v, photo electric effect does not happen, and excitation take place

this effect is shown as a equation,

hv=hv₀+ KE

where, hv is energy of incident frequency

          hv₀ is work function or energy of threshold frequency

          KE is kinetic energy

hope it helps you

Answer 2

Answer:

PLEASE REFER TO THE ATTACHMENT!!