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De-Broglie wavelength of an electron accelerated by a voltage of 50 V is close to e = 1.6 × 10 - 19 C , m e = 9.1 × 10 - 31 k g , h = 6.6 × 10 - 34 J s

Options

  1. A0.5 Å
  2. B1.2 Å
  3. C1.7 Å
  4. D2.4 Å

Correct answer

C. 1.7 Å

Step-by-step solution

De-Broglie wavelength λ in given by λ = h m v = h 2 m e V and for electron λ = 12.27   A ° V = 12.27   A ° 50 = 1.7 A °

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