Skip to content
PhysicsNEET 2021Matter waves and de Broglie wavelength

Dual Nature of Radiation and Matter

An electromagnetic wave of wavelength λ\lambda is incident on a photosensitive surface of negligible work function. If the photoelectron of mass mm emitted from the surface has de Broglie wavelength λd\lambda_d, then:

  1. A.λ=(2mhc)λd2\lambda = \left(\dfrac{2m}{hc}\right)\lambda_d^2
  2. B.λd=(2mch)λ2\lambda_d = \left(\dfrac{2mc}{h}\right)\lambda^2
  3. C.λ=(2mch)λd2\lambda = \left(\dfrac{2mc}{h}\right)\lambda_d^2✓
  4. D.λ=(2hmc)λd2\lambda = \left(\dfrac{2h}{mc}\right)\lambda_d^2

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

More from this chapter in past papers

From Physics › Dual Nature of Radiation and Matter › Matter waves and de Broglie wavelength — lectures, notes and every past question on it.

Last revised . Found a mistake? Tell us — corrections are the fastest thing we act on.

ShareWhatsAppTelegram