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JEE Main202124 Feb 2021Evening ShiftPhysicsDual Nature of MatterActual

The de Broglie wavelength of a proton and α -particle are equal. The ratio of their velocities is

Options

  1. A4 : 1
  2. B4 : 3
  3. C1 : 4
  4. D4 : 2

Correct answer

A. 4 : 1

Step-by-step solution

λ = h m v λ p = λ α m P V P = m α v α m P v P = 4   m p v α m α = 4   m P v p v α = 4

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