How lasers work (in theory)

The video explains how atoms emit light when excited and how photons stimulate each other to emit more light. By trapping light between mirrors, a cascade of illumination is created. Photons tend to be in the same state, unlike coins, which leads to coherent light emission. This behavior is harnessed to create a laser beam by allowing photons to interact and stimulate further emission.

What new insight or understanding did you gain from this video?