The Davisson Germer experiment is used to explain:

Explanation

In the Davisson-Germer experiment, a beam of electrons is fired at a crystal of nickel. The electrons are diffracted by the crystal, producing a pattern of bright and dark spots on a detector screen. This pattern is similar to the interference pattern produced by light passing through a diffraction grating. The observed pattern can only be explained if the electrons behave like waves and interfere with each other as they pass through the crystal. The diffraction of electrons in the Davisson-Germer experiment provided strong evidence for the wave-like nature of matter and demonstrated that electrons can exhibit both wave-like and particle-like behaviour, depending on the experimental setup.