In the early 1900s, a French physicist came up with a new idea to explain the theory of atomic structures. That physicist was a man by the name of Louis de Broglie.
Broglie hypothesized that particles could take on the properties of waves. Broglie's theory turned out to be correct and was confirmed a few years later in one of the most famous light experiments of all time, the double-slit experiment.
By confirming the theory that particles could act as waves simultaneously, physicists had discovered that electron streams act the same way as light.
Electrons, negatively charged electronic particles, can act as both waves and particles. This is known as wave-particle duality.
Wave-particle duality doesn't have a massive impact on electrons as a whole, but it does help physicists understand many of the strange behaviors that electrons present.
To read more, click here.