A photoelectric surface is illuminated successively by monochromatic light of wavelengths λ and 2 λ . If the maximum kinetic energy of the emitted photoelectrons in the first case is 4 times that of the second case, then the work function of the surface is

Question

A photoelectric surface is illuminated successively by monochromatic light of wavelengths λ and 2 λ . If the maximum kinetic energy of the emitted photoelectrons in the first case is 4 times that of the second case, then the work function of the surface is, h c 3 λ, h c 4 λ, h c 2 λ, 3 h c 4 λ

MARKS App · Accepted Answer

h c λ - ϕ = 4 h c 2 λ - ϕ ⇒ 3 ϕ = h c λ ϕ = h c 3 λ

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