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MHT CET202015 Oct 2020Morning ShiftPhysicsDual Nature of MatterActual

How much energy is imparted to an electron so that its de-Broglie wavelength reduces from 10⁻¹⁰ ~m to 0 5 10⁻¹⁰ ~m ?( E = energy of electron )

Options

  1. A4 E
  2. B2 E
  3. C3 E
  4. DE

Correct answer

C. 3 E

Step-by-step solution

= h 2 mE ₁ ₂ = E ₂ E ₁ 1 10⁻⁹ 0.5 10⁻⁹ = E ₂ E ₁ 2= E ₂ E ₁ E ₂ E ₁ =4 E ₂=4 E ₁

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