Which of the following observations was made in the Davisson-Germer experiment that led to the confirmation of the wave-particle duality of matter?
Diffraction pattern observed when electrons were scattered from a crystal lattice
Continuous spectrum observed when electrons were passed through a metal foil
Interference pattern observed when electrons were passed through a double-slit
Scattering pattern observed when electrons were passed through a gas
The Davisson-Germer experiment provided evidence for the wave-particle duality of matter. In this experiment, a beam of electrons was directed at a nickel crystal lattice, and the scattered electrons were observed using a fluorescent screen. The experiment revealed a diffraction pattern, which was similar to the diffraction pattern observed when light is diffracted through a crystal lattice. This observation confirmed that electrons, which were previously believed to be particles, also exhibit wave-like behavior.
Option (b) is incorrect because passing electrons through a metal foil produces a continuous spectrum, similar to the spectrum of light emitted by a hot object, and does not provide evidence for the wave-particle duality of matter.
Option (c) is incorrect because the double-slit experiment is typically used to demonstrate the wave-like behavior of light, not electrons.
Option (d) is incorrect because passing electrons through a gas produces a scattering pattern, which is not related to the wave-particle duality of matter.