When light of wavelength is incident on a photosensitive surface, the stopping potential is V . When light of wavelength 3 is incident on the same surface, the stopping potential becomes V' . If is the work function of the surface and e is

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When light of wavelength is incident on a photosensitive surface, the stopping potential is V . When light of wavelength 3 is incident on the same surface, the stopping potential becomes V' . If is the work function of the surface and e is the magnitude of the elementary charge, then V' is given by:

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Correct answer: B. 3V + 2 e

According to Einstein's photoelectric equation, the stopping potential V for incident light of wavelength is given by: eV = hc - hc = eV + When light of wavelength 3 is incident, the new stopping potential V' is given by: eV' = hc ( 3 ) - eV' = 3hc - Substituting the value of hc from the first equation: eV' = 3(eV + ) - eV' = 3eV + 3 - eV' = 3eV + 2 V' = 3V + 2 e Answer: 3V + 2 e

When light of wavelength is incident on a photosensitive surface, the stopping potential is V . When light of wavelength 3 is incident on the same surface, the stopping potential becomes V' . If is the work function of the surface and e is the magnitude of the elementary charge, then V' is given by:

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