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For photoelectric emission from certain metal the cut-off frequency is v . If radiation of frequency 2 v impinges on the metal plate, the maximum possible velocity of the emitted electron will be ( m is the electron mass)

Options

  1. Ah v (2 m)
  2. Bh v m
  3. C2 h v m
  4. D2 h v m

Correct answer

C. 2 h v m

Step-by-step solution

aligned & As 1 2 m v_ ^2=h v & v_ ^2= 2 mN m & v_ = 2 h ~V ~m & aligned

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