Rankers Physics
Topic: Modern Physics
Subtopic: Photoelectric Effects and deBroglie Equation

Photoelectric emission is observed from a metallic surface for frequencies ν1 and ν2 of the incident light rays (ν1 > ν2). If the maximum value of kinetic energy of the photoelectrons emitted in the two cases are in the ratio of 1 : k, then the threshold frequency of the metallic surface is :
\[\frac{\nu_{1}-\nu_{2}}{k-1}\]
\[\frac{k\nu_{1}-\nu_{2}}{k-1}\]
\[\frac{k\nu_{2}-\nu_{1}}{k-1}\]
\[\frac{\nu_{2}-\nu_{1}}{k}\]

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