by Ciro Santilli (@cirosantilli, 34)
Figure 1.
Schematic of the Davisson-Germer experiment
. Source.
Relates particle momentum and its wavelength, or equivalently, energy and frequency.
The wavelength relation is:
(1)
but since:
(2)
the wavelength relation implies:
(3)
Particle wavelength can be for example measured very directly on a double-slit experiment.
So if we take for example electrons of different speeds, we should be able to see the diffraction pattern change accordingly.

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