De Broglie's hypothesis, known as the de Broglie hypothesis, stated that all matter has wave-like properties. He derived a relationship between the momentum of a particle and its wavelength, which is now known as the de Broglie wavelength:
λ = h/p
where:
* λ is the wavelength
* h is Planck's constant
* p is the momentum
This groundbreaking idea was later experimentally confirmed by Clinton Davisson and Lester Germer in 1927, who observed electron diffraction patterns, providing strong evidence for the wave nature of electrons.