a) Light with a photon energy of 6 eV impinges on the surface of a material with

Question

a) Light with a photon energy of 6 eV impinges on the surface of a material with work function 1.6 eV to eject electrons. What is the kinetic energy of the outgoing electrons?

b) After light impinges on the surface of a material with work function 1.8 eV, the measured kinetic energy of the outgoing electrons is 2.7 eV. What is the photon energy of the incoming light?

c) Light with a photon energy of 3.5 eV impinges on the surface of a material and eject electrons with kinetic energy 1.9 eV. What is the work function of the material?

Explanation / Answer

a) 4.4eV

b) 4.5eV

b) 1.6eV

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