The Germer experiment, also known as the Davisson–Germer experiment, was a pivotal experiment conducted by physicists Clinton Davisson and Lester Germer in 1927. Building on Louis de Broglie’s concept of matter waves, the experiment provided experimental confirmation of the wave-particle duality of electrons, a cornerstone of quantum mechanics. Davisson and Germer directed a beam of electrons at a crystalline nickel target, expecting simple scattering patterns. However, they observed distinct diffraction patterns, similar to those produced by X-rays, indicating that electrons exhibit wave-like behavior. This experiment played a crucial role in the development of quantum mechanics, supporting the idea that particles, such as electrons, possess both particle and wave characteristics.