What was a key experimental tool in the Davisson-Germer experiment?
Particle accelerator
Nickel crystal
Laser beam
Telescope
Answer
Nickel crystal was a key experimental tool in the Davisson-Germer experiment. This experiment demonstrated the wave-particle duality of electrons by showing that they could be diffracted by a crystal lattice, just like X-rays. The nickel crystal acted as a grating, scattering the electrons in a way that produced a diffraction pattern.
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