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MHT CET20244 May 2024Evening ShiftPhysicsDual Nature of MatterActual

The kinetic energy of an electron is increased by 2 times, then the de-Broglie wavelength associated with it changes by a factor.

Options

  1. A1 3
  2. B1 3
  3. C3
  4. D3

Correct answer

B. 1 3

Step-by-step solution

Kinetic Energy, E= 1 2 mv ^2= 1 2 ( mv )^2 ~m = p ^2 2 ~m p = 2 mE ...(i) De-Broglie wavelength, aligned & = h p = h 2 mE & 1 E aligned ...[From(i)] When kinetic energy is increased by 2 times, E ₂= E ₁+2 E ₁=3 E ₁ changes by factor of 1 3

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