A-LevelPhysicsQuantum physicsOct/Nov 2020Paper 4 Q1110 Marks
Electromagnetic radiation is incident on a metal surface. It is observed that there is a minimum frequency of electromagnetic radiation below which emission of electrons does not occur. This observation provides evidence for a particulate nature of electromagnetic radiation. The maximum kinetic energy E_MAX of electrons emitted from a metal surface is determined for different wavelengths λ of the electromagnetic radiation incident on the surface. The variation with 1/λ of E_MAX is shown in [Figure 11.1].
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