Two identical photo cathode receive light of frequencies f 1 and f 2 . If the velocities…

Chemistry · NEET · NTA Exams — Structure of Atom

Two identical photo cathode receive light of frequencies f1 and f2. If the velocities of the photoelectrons (of mass m) are v1 and v2 respectively, then
  1. \(v_{1}^{2}-v_{2}^{2}=\frac{2 h}{m}\left[f_{1}-f_{2}\right]\)
  2. \(v_{1}+v_{2}=\left[\frac{2 h}{m}\left(f_{1}+f_{2}\right)\right]^{\frac{1}{2}}\)
  3. \(v_{1}-v_{2}=\left[\frac{2 h}{m}\left[f_{1}-f_{2}\right]\right]^{\frac{1}{2}}\)
  4. \(v_{1}^{2}+v_{2}^{2}=\frac{2 h}{m}\left[f_{1}+f_{2}\right]\)

Answer

(A) v_ 1 ^ 2 -v_ 2 ^ 2 = 2 h m [f_ 1 -f_ 2 ]

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