The wave nature of electrons was first proved by whom?

  1. Photoelectric effect
  2. Double slit experiment
  3. Davison and Germer experiment
  4. Compton effect
  5. None of the above/More than one of the above.

Answer (Detailed Solution Below)

Option 3 : Davison and Germer experiment
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Detailed Solution

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The correct answer is Davison and Germer experiment.

  • The Davisson and Germer experiment demonstrated the wave nature of the electrons, confirming the earlier hypothesis of de Broglie.
  • Electrons exhibit diffraction when they are scattered from crystals whose atoms are spaced appropriately.
  • Putting wave-particle duality on a firm experimental footing, represented a major step forward in the development of quantum mechanics.
  • Davisson and Germer designed and built a vacuum apparatus for the purpose of measuring the energies of electrons scattered from a metal surface.
  • Electrons from a heated filament were accelerated by a voltage and allowed to strike the surface of nickel metal.

 

Apparatus of Davisson and Germer experiment

Additional Information

Experiment Description
Photoelectric effect The photoelectric effect is often defined as the ejection of electrons from a metal plate when light falls on it.
Double slit experiment It suggests that what we call "particles", such as electrons, somehow combine characteristics of particles and characteristics of waves.
Compton effect The Compton effect (also called Compton scattering) is the result of a high-energy photon colliding with a target, which releases loosely bound electrons from the outer shell of the atom or molecule.

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