#### The maximum KE of the photoelectron is found to be , when the metal is irradiated with a radiation of frequency  . The threshold frequency of the metal is about Option 1) Option 2) Option 3) Option 4)

As learnt in

Photoelectric Effect -

- wherein

where

m is the mass of the electron

u is the velocity associated with the ejected electron.

h is plank’s constant.

v is frequency of photon,

v0 is threshold frequency of metal.

maximum KE

threshold frequency

we have

Option 1)

This solution is correct.

Option 2)

This solution is incorrect.

Option 3)

This solution is incorrect.

Option 4)

This solution is incorrect.