Radiations of two photon's energy, twice and ten times the work function of metal are incident on the metal surface successively. The ratio of maximum velocities of photoelectrons emitted in two

Question

Radiations of two photon's energy, twice and ten times the work function of metal are incident on the metal surface successively. The ratio of maximum velocities of photoelectrons emitted in two cases is

TestHub · Accepted Answer

We know that 1 2 m v 1 2 = 2 ϕ 0 - ϕ 0 = ϕ 0 and 1 2 m v 2 2 = 10 ϕ 0 - ϕ 0 = 9 ϕ 0 ∴ v 1 v 2 = ϕ 0 9 ϕ 0 = 1 3

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