Photoelectric emission is observed from a metal surface for frequencies ν1 and ν2 of the incident radiation (ν1 ν2). If maximum kinetic energies of the photoelectrons in the two cases are in the rat

Question

Photoelectric emission is observed from a metal surface for frequencies ν1 and ν2 of the incident radiation (ν1 > ν2). If maximum kinetic energies of the photoelectrons in the two cases are in the ratio 1:K, then the threshold frequency for the metal is given by

Prashant Kotian · Accepted Answer

Correct answer: D. K.E.1/K.E.2 = h(ν1-ν0)/h(ν2-ν0) = 1/K => K(ν1-ν0) = ν2-ν0 => ν0 = (Kν1-ν2)/(K-1).

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