Davisson-Germer Experiment (1927)
Details: Actual experiment involve electrons scattered from a Nickel crystal.
Done at Bell Labs -- where Davisson and Germer studying electrons in vacuum tubes
- For fixed energy of the incident electrons, (E = 54 eV, l = 1.65Å), we expect to see an interference peak in the scattered electrons if the angle ? is such that the path difference is an integral number of wavelengths.
- Alternatively, for a fixed scattering angle (? = 65°), we expect to see the scattering rate to be large for incident electron energies which correspond to de Broglie wavelengths which are equal to the path difference between layers divided by an integer.