Ultraviolet light is incident on two photosensitive materials, having work functions `W_1` and `W_2`, where `W_1 > W_2`. In which case will the kinetic energy of emitted electrons be greater? Why?

Plot a graph showing the variation of stopping potential with the frequency of incident radiation for two different photosensitive materials having work functions W_1 and W_2 (W_1>W_2). On what factors does the slope and intercept of the lines depends.

Light of wavelength 5000 overset @A falls on a photosensitive plate with work function 1.9 eV. FInd maximum kinetic energy of photoelectron and stopping potential.