Question
In Davisson and Germer experiment, state the observations which led to (i) show the wave nature of electrons and (ii) confirm the de-Broglie relation.
Solution
i) In Davison and germer experiment,
The appearance of peak in a particular direction is due to constructive interference of electrons scattered from different layers of regularly spaced atoms of the crystal, i.e., the diffraction of electrons take place. This established the wave nature of electron.
ii) According to Davison- Germer experiment, the wavelength of the wave is found out to be 1.65 .
According to De- Broglie hypothesis, wavelength is given by 1.66 .
There is a close agreement with the estimated value of both experiments.
Hence, the De-broglie relation is established.
