Question

In the Davisson-Germer experiment, the electron beam is made to fall on the surface of _________ crystals.
A. Nickel
B. Iron
C. Gold
D. Cesium

Answer 1

This question is based on the experiment that was performed by the two scientists to experimentally prove the wave nature of the particle. This experiment that was performed to prove the wave nature of the particle is known as Davisson-Germer experiment.

Complete step by step answer:
In this question, first we have to know about the Davisson-Germer experiment. This experiment was conducted in 1927, and this experiment was performed by two scientists Clinton Davisson and Lester Germer. This experiment was conducted to prove the wave nature of the particle experimentally.
The wave nature of the particle is the concept used in quantum mechanics that every particle in the universe shows either wave or particle nature. It describes the behavior and properties of the particle.

In this experiment, an electron beam from an electron gun directed through a hole and hit the surface of a nickel crystal. Due to this strike of the electron beam on the nickel crystal normally then the electrons spread in all directions. To prevent the collision of an electron with another molecule, the experiment was conducted in a vacuum chamber. The detector indicates the maximum intensity of scattered electrons at a particular angle. This maximum intensity occurs due to constructive interference of two waves. Therefore by this experiment, the wave nature of electrons was proved.

So, the correct answer is “Option A”.

Note:
In this experiment, we have to know about the Davisson-Germer experiment. The experiment was performed by Davisson and Germer, but the result was explained by Elsasser's proposition. The intention of the Davisson-Germer experiment was not to confirmed De Brogle’s hypothesis.