What proves wave-particle duality?
What is the de Broglie wavelength?
Every object with a momentum has a wavelength associated with it.
What is electron diffraction?
When electrons diffract in the same way a wave would.
What is the photoelectric effect?
When incident photons have enough energy to liberate an electron from the surface of a material.
What is the equation for the de Broglie wavelength?
Wavelength = Planck constant / Momentum