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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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