Answer:
diffraction
Explanation:
Louis de Broglie in 1924 proposed the idea of wave particle duality. In his proposition, matter could exhibit wavelike properties.
Electrons are generally regarded as particles. Electrons may also display wavelike properties such as diffraction patterns. Generally, diffraction is regarded as a property of waves.
Hence, electron diffraction effect owes to the wavelike nature of of electrons when they are passed near matter.