Quantum Physics (OCR Physics A)

Key words and definitions for the Quantum Physics part of Unit G482 of OCR Physics A (AS Level). Created by Rob Cowen, Head of Physics (www.cowenphysics.com).
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work function
minimum energy to release an electron from the surface of a metal
threshold frequency
the minimum frequency of electromagnetic radiation that will release an electron from the surface of a metal
photon
a packet of energy
photoelectric effect
emission of electrons from a metal surface when photons are incident on the surface
line spectrum
light emitted from atoms to produce a series of lines against a dark background