KnowraPhotoelectric effectLinked fromLinked fromThe 59 pages that link to Photoelectric effect, each with the reason it gives.All 59Broader topic 2Related 45Narrower topic 3Compared with 9Electromagnetic interactionBroader topic: It directly demonstrates energy transfer from photons to charged particles.Philipp LenardBroader topic: Lenard measured how light frequency and intensity affected emitted electrons.