PhysicsNEET 2021Matter waves and de Broglie wavelength

Dual Nature of Radiation and Matter

An electromagnetic wave of wavelength $λ$ is incident on a photosensitive surface of negligible work function. If the photoelectron of mass $m$ emitted from the surface has de Broglie wavelength $λ_{d}$ , then:

A. $λ = (\frac{2 m}{h c}) λ_{d}^{2}$
B. $λ_{d} = (\frac{2 m c}{h}) λ^{2}$
C. $λ = (\frac{2 m c}{h}) λ_{d}^{2}$ ✓
D. $λ = (\frac{2 h}{m c}) λ_{d}^{2}$

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

Dual Nature of Radiation and Matter

More from this chapter in past papers