Question

The deflection of the galvanometer in Davisson-Germer experiment, is proportional to the intensity of the electron beam entering the collector. true $=1$, false $=0$

Answer 1

Davisson and Germer experiment was conducted by two American scientists Clinton Davisson and Lester Germer, in 1927, to verify the de Broglie hypothesis that a material particle posses wave nature.

The electron beam was made to pass through a hole and strike the nickel crystal normally, the electrons scattered in all directions acting like waves.The detector detected the intensities of the diffracted electron beam in all direction. More the intensity of the diffracted electron beam, more was the deflection of the galvanometer. The detector indicated the peak intensity of diffracted electrons at certain angle. This maximum intensity was due to constructive interference of two waves.