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MHT CET202015 Oct 2020Morning ShiftPhysicsDual Nature of MatterActual

In experiment of photoelectric effect, the stopping potential for a given metal is ^ V ₀ ^ volt, when radiation of wavelength ^ ₀ ^ is used. If radiation of wavelength ^ 2 ₀ ^ is used for the same metal, then the stopping potential (in volt) will be [ e = charge on electron, c = speed of light, h = Planck's constant.]

Options

  1. AV ₀+ hc 2 e ₀
  2. B~V ₀- hc 2 e ₀
  3. CV₀ 2
  4. D2 ~V ₀

Correct answer

B. ~V ₀- hc 2 e ₀

Step-by-step solution

h v- ₀=e V₀ h c ₀ - ₀=e V₀ h c 2 ₀ - ₀=e V_ s = h c ₀ [1- 1 2 ]=e (V₀-V_ s )=e V₀-e V_ s V_ s =V₀- h c 2 ₀ e

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