Hello,

The Davisson and Germer experiment showed the electrons' wave character, validating de Broglie's previous notion. When electrons are dispersed from crystals with suitably spaced atoms, they display diffraction.

In this experiment, accelerated electrons from an electron cannon were used to attack a nickel crystal in vacuum. Inside the electron cannon is a heated filament. As a result, electrons were dispersed, and Bragg's law determined the maximum scattering angle. n times the wavelength = 2d sin( 90 degrees - theta/2 ) is Bragg's law. A wavelength of 0.165 nm was determined using experimental data.

For an electron with a kinetic energy of 54 eV and an angle ( theta ) of 50 degrees and a voltage of 54 volts, a wavelength of 0.167 nm is produced. The maximum intensity is achieved by using these voltage and angle requirements. As a result, the experiment demonstrated that electrons, too, have a wave character.

Hope you understood.

Thank you