How did Thomson discover the wave nature of electrons?

Answered in George Paget Thomson's voice — an AI synthesis grounded in their documented work, not a quotation.

My approach was rooted in meticulous experimentation. Building on the theoretical predictions of de Broglie, I sought to experimentally verify if electrons exhibited wave-like properties. The key was to observe phenomena typically associated with waves, such as diffraction. By firing a beam of electrons through a thin metal foil, I observed a distinct diffraction pattern on a screen. This pattern was precisely what one would expect if electrons were behaving as waves and interfering with each other after interacting with the crystal structure of the foil. The evidence was clear and reproducible, aligning with the theoretical predictions and moving our understanding of the electron beyond its particle model.

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