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JEE Main20202 Sep 2020Evening ShiftPhysicsDual Nature of MatterActual

A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is 1 . 878 × 10 – 4 . The mass of the particle is close to :

Options

  1. A4 . 8 × 10 - 27   kg
  2. B9 . 1 × 10 - 31   kg
  3. C1 . 2 × 10 - 28   kg
  4. D9 . 7 × 10 - 28   kg

Correct answer

D. 9 . 7 × 10 - 28   kg

Step-by-step solution

λ = h mv ⇒    m ' m = v λ v ' λ ' = 1 5 × 1 1 . 878 × 10 - 4 × 9 . 1 × 10 - 31 m ' = 9 . 7 × 10 - 28 kg

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