jan 1, 1924 - Louis de Broglie
Description:
He came up with the idea that electrons are particles that behave like waves, known as wave-particle duality. The ground state of an atom is when it has the minimum amount of energy. The maximum is the excited state. When the excited state goes back to the ground state, it releases light, which is called photon or quanta.Added to timeline:
Date:
jan 1, 1924
Now
~ 101 years ago