Question

what is davisson germer experiment?

Answer 1

Initial atomic models proposed by scientists could only explain the particle nature of electrons but failed to explain the properties related to their wave nature. C.J. Davisson and L.H. Germer in the year 1927 carried out an experiment, popularly known as Davisson Germer experiment to explain the wave nature of electrons through electron diffraction. 

Answer 2

Davisson and Germer experiment:-
The main principle of this experiment is to prove that the x-rays showing wave character.
Davidson and germer experiment in 1927 conformed the De-broglie wavelength of duality . It also confirmed the see Broglie's wavelength equation.
A beam of electrons obtained from a heated tungsten filament is accelerated through a high potential. It hits a nickel crystal and the electrons are scattered in different directions. The diffraction pattern obtained is similar to Bragg's experiment on diffraction of X-rays.
It is deduced that electrons too have wave nature as the X& rays have wave character. Only waves undergoes diffraction and pattern doesn't undergoes diffraction. The wavelength of the waves are nearly equal to the de-Broglie wavelength.
Apart from that G.P Thomson performed a experiment to verify the wave nature of the x-rays excepting the fact that the thin foil of Gold plate is used instead of nickel crystal.
Hope this helped you a little!!!