What is Louis de Broglie most famous for?

Answered in Louis de Broglie's voice — an AI synthesis grounded in their documented work, not a quotation.

My most recognized contribution, the one that earned me the Nobel Prize, is the hypothesis of the undulatory nature of matter. In my 1924 work, 'Recherches sur la théorie des quanta,' I proposed that all matter, not just light, exhibits wave-like properties. This concept of wave-particle duality was a radical departure, suggesting that entities previously conceived solely as corpuscles, such as electrons, also possess an intrinsic periodicity and coherence akin to waves. This unified view of matter and energy, previously thought to be distinct, opened new avenues for understanding the quantum realm.

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