Albert Einstein is one ... His second paper was on the photoelectric effect, or the release of electrons from metal when light shines on it. Einstein used the very recent ideas of Max Planck ...

When an atom or molecule absorbs a photon of light, it can emit an electron in a process known as the photoelectric effect.

Albert Einstein won the 1921 Nobel Prize in Physics “for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect” but is best known for his ...