Photons of energies 1.0 eV, 2.0 eV and 3.0 eV strike a metal surface whose work function
Question:
Photons of energies 1.0 eV, 2.0 eV and 3.0 eV strike a metal surface whose work function is 1.8 eV.
a. State which of these photons could cause the release of an electron from the metal.
b. Calculate the maximum kinetic energies of the electrons released in each case. Give your answers in eV and in J.
You will need these values to answer questions:
Speed of light in a vacuum c = 3.00 × 108 m s−1
Planck constant h = 6.63 × 10−34 J s
Mass of electron me = 9.11 × 10−31 kg
Elementary charge e = 1.60 × 10−19 C
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Related Book For
Cambridge International AS And A Level Physics Coursebook
ISBN: 9781108859035
3rd Edition
Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside
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