Ultraviolet light is incident on two photosensitive materials having work function `W_(1)` and `W_(2) (W_(1) gt W_(2))`. In which case will the kintic enrgy of the emitted electrons be greater? Why?

Explanation

`K.E.` of photoelectron `hv-W`
As `W_(1) gt W_(2)`, so the kinetic energy of the emitted electrons will be greater for the photoelectronic material having work function `W_(2)`.