Ultraviolet radiations of different frequencies `v_(1)`are incident on two photosensitive materials having work functions `W_(1)` and `W_(2) (W_(1) gt W_(2))` respectively. The kinetic energy of the emitted electrons is same in both the cases. Which one of the two radiations will be of higher frequency?

Explanation

`h upsilon_(1)=K+W_(1)`
`h upsilon_(2)=K+W_(2)`
As `W_(1) gt W_(2)`, so `upsilon_(1) gtupsilon_(2)`