Question

What is Davisson-germer experiment?

Answer 1

Davisson germer experiment:

1. In 1927, C.J. Davisson and L.H. Germer performed an experiment known as the Davisson Germer experiment to explain the wave nature of electrons through electron diffraction.
2. A low voltage power supply was used to heat an electron gun with a tungsten filament F coated with barium oxide.
3. When a suitable potential difference is applied from a high voltage power supply, the electron gun emits electrons that are then accelerated to a specific velocity.
4. These emitted electrons were made to pass through a cylinder perforated with fine holes along its axis, producing a finely collimated beam.
5. The cylinder's beam is once more directed toward the surface of a nickel crystal. As a result, electrons scatter in various directions.
6. The intensity of the electron beam produced is measured by the electron detector after it is connected to a sensitive galvanometer (to measure voltage).

An illustrative setup of the experiment is shown below.