Recently, I saw a video on Introductory Quantum Mechanics. Here's the link : https://www.youtube.com/watch?v=5Gnqpbge3Yk I failed to understand the explanation of de Broglie's model. He mentions that the waves interfere with each other but how do we know the properties like amplitude etc. of those waves and what does he mean by the "the wavelengths calculated for the electron". Does it relate to the amount of potential energy an electron has?