Deepak Scored 45->99%ile with Bounce Back Crack Course. You can do it too!

# If p is the momentum of the fastest electron ejected

Question:

If $p$ is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength $\lambda$, then for $1.5 \mathrm{p}$ momentum of the photoelectron, the wavelength of the light should be:

(Assume kinetic energy of ejected photoelectron to be very high in comparison to work function)

1. $\frac{1}{2} \lambda$

2. $\frac{3}{4} \lambda$

3. $\frac{2}{3} \lambda$

4. $\frac{4}{9} \lambda$

Correct Option: , 4

Solution: