The momentum fastest electron |AtomicStructureJEEMain2019

JEE MAIN 2019

08-04-2019 S2

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 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):

Select the correct option:

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

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

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

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

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution