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Find the de-Broglie Wavelength for an electron moving at the speed of 5.0 × 106 m/s. (mass of electron is 9.1 × 10-31) -

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Question

Find the de-Broglie Wavelength for an electron moving at the speed of 5.0 × 106 m/s. (mass of electron is 9.1 × 10-31)

Options

  • 1 × 10-10 m

  • 2 × 10-10 m

  • 3 × 10-10 m

  • 4 × 10-10 m

MCQ

Solution

1 × 10-10 m

Explanation:

`lambda = h/p = h/(mV)`

= `(6.63 xx 10^-34 J.S)/((9.1 xx 10^-31  kg)(5.0 xx 10^6  m/s))`

= 1 × 10-10 m

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