If P is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having a wavelength , then for 1.5 P momentum of the photoelectron, the wavelength of the light should be:
(Assume kinetic energy of elected photoelectron to be very high in comparison to work function):
3/4
1/2
2/3
4/9
As we learnt,
Now we have:
Therefore, Option(4) is correct.