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JEE Main201911 Jan 2019Evening ShiftChemistryStructure of AtomActual

The de Broglie wavelength ( ) associated with a photoelectron varies with the frequency (v) of the incident radiation as, [v₀ . is threshold frequency]:

Options

  1. A1 (v-v₀ )
  2. B1 (v-v₀ )^ 1 4
  3. C1 (v-v₀ )^ 3 2
  4. D1 (v-v₀ )^ 1 2

Correct answer

D. 1 (v-v₀ )^ 1 2

Step-by-step solution

According to de-Broglie wavelength equation, = h m v 1 v According to photoelectric effect, array l hv - hv ₀= 1 2 mv ² ; v - v ₀= 1 2 = mv ² ~h v - v ₀ v ² v ( v - v ₀ )^ 1 / 2 1 ( v - v ₀ )^ 1 / 2 array

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