The phrase "photoelectric effect" refers to the phenomenon where light, or photons, can knock electrons loose from atoms in certain materials, creating an electric current. Full definition
Einstein explained the so - called photoelectric effect by asserting that light, which was known to flow in continuous waves, could also be regarded as sputtering along in discrete particles, or quanta. (discovermagazine.com)
It is based on the external photoelectric effect predicted by Einstein. (sciencedaily.com)
Covering the more conceptual photoelectric effect and the more practical based experiment to determine Planck's constant using LEDs, they use the CLOZE passage format to provide structure for students who struggle with written expression. (tes.com)