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What should be the velocity of an electron so that its momentum becomes equal to that of a photon of wavelength 5200 A ∘ ?

Options

  1. A700 m s - 1
  2. B1000 m s - 1
  3. C1400 m s - 1
  4. D2800 m s - 1

Correct answer

C. 1400 m s - 1

Step-by-step solution

According to De Broglie's equation Momentum, p = h λ or v = h m λ = 6.62 × 10 - 34 9.1 × 10 - 31 × 5.2 × 10 - 7 = 1.4 × 10 3 m s - 1 = 1400 m s - 1

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