Photoelectric emission is observed from a metallic surface for frequencies ν 1 and ν 2 of…
Physics · JEE Advanced · NTA Exams — Atoms and Nuclei
Photoelectric emission is observed from a metallic surface for frequencies ν1 and ν2 of the incident light rays (ν1 > ν2). If the maximum values 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
- \(\frac{v_{1}-v_{2}}{k-1}\)
- \(\frac{\mathrm{k} v_{1}-v_{2}}{\mathrm{k}-1}\)
- \(\frac{\mathrm{k} v_{2}-v_{1}}{\mathrm{k}-1}\)
- \(\frac{v_{2}-v_{1}}{k}\)
Answer
(B) k v_ 1 -v_ 2 k -1
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