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In Davison and Germer experiment the electron beam is incident on:

  1. Sodium crystal
  2. Silicon crystal
  3. Nickel crystal
  4. None of these

Answer (Detailed Solution Below)

Option 3 : Nickel crystal
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Detailed Solution

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CONCEPT:

Davison and Germer experiment:

  • Davison and Germer experiment was conducted in 1927 to study the wave nature of the electron.
  • The electrons are emitted by an electron gun and are accelerated by applying a suitable potential difference between anode and cathode.
  • The finely collimated beam is directed towards the Ni crystal.
  • The scattered electrons are collected using a movable detector and a graph is plotted between applied potential and angle of reflection.
  • Analysis of those graphs showed the wave nature of the electron.

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EXPLANATION:

  • In Davison and Germer experiment the electrons are emitted by an electron gun and are accelerated by applying a suitable potential difference between anode and cathode.
  • The finely collimated beam is directed towards the Ni (Nickel) crystal. Hence, option 3 is correct.
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