Mention the inference of the Davission-Garmer experiment

Davisson and Lester H. Germer found that a beam of electrons, when reflected from a metallic crystal, shows diffraction patterns similar to those of X rays and other electromagnetic waves The Davisson and Germer experiment demonstrated the wave nature of the electrons, confirming the earlier hypothesis of de Broglie. Electrons exhibit diffraction when they are scattered from crystals whose atoms are spaced appropriately.

Draw the curve showing de Broglie wavelength of a particle with its momentum. Find the momentum of a photon of wavelength 0 . 01 A

The Graph between the wavelength and the momentum λ vs mv is shown above, As de Broglie wavelength λ = h p = mv , the wavelength is inversely proportional to the momentum as shown in the graph. Given the wavelength of the photon λ = 0 . 01 A = 0 . 01 × 10 - 10 m Substituting the values, we have, p = h λ = 6 . 63 × 10 - 34 10 - 12 = 6 . 63 × 10 - 22 k g m / s . Hence the momentum is 6 . 63 × 10 - 22 kgm / s