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MHT CET20226 Aug 2022Evening ShiftPhysicsDual Nature of MatterActual

In photoelectric experiment the stopping potential was measured to be V₁ and V₂ volt with incident light of wavelength and 2 respectively the value of V₂ is [ ( = work function, e= electronic charge ]

Options

  1. AV₁+ 2 e
  2. B2 V₁+ e
  3. C2 V₁- e
  4. DV₁- 2 e

Correct answer

B. 2 V₁+ e

Step-by-step solution

Einstein's' photoelectric equation dictates: e V= h c - For incident wavelength : For incident wavelength 2 : h c / 2 = +e V₂ On subtracting equation (2) and (1) aligned & 2 1 = +e V₂ +e V₁ & 2 +2 e V₁= -e V₂ & V₂= e +2 V₁ aligned

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