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JEE Main202122 Jul 2021Morning ShiftPhysicsDual Nature of MatterActual

An electron of mass m e and a proton of mass m P are accelerated through the same potential difference. The ratio of the de-Broglie wavelength associated with the electron to that with the proton is

Options

  1. Am P m e
  2. B1
  3. Cm p m e
  4. Dm e m p

Correct answer

C. m p m e

Step-by-step solution

KE = e Δ V λ e = h 2   m e ( e Δ V ) λ p = h 2   m p ( e Δ V ) ⇒    λ e λ p = m p m e

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