A-LevelPhysicsQuantum physicsOct/Nov 2019Paper 4 Q1112 Marks
(a) With reference to the photoelectric effect, state what is meant by work function energy. (b) The work function energy of a clean metal surface is 5.5 × 10⁻¹⁹ J. Electromagnetic radiation of wavelength 280 nm is incident on the metal surface. The metal is in a vacuum.
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