NEET Physics Davisson-Germer Experiment MCQ Question
In the Davisson-Germer experiment, electrons are scattered at different angles after striking a nickel crystal. If the speed of the electrons is 0.1 times the speed of light, what is the de Broglie wavelength of these electrons?
43 × 10^-10 m
31 × 10^-10 m
21 × 10^-10 m
56 × 10^-10 m
Correct Answer
Detailed Explanation
To find the de Broglie wavelength, use λ = h / (mv) where v = 0.1c. Given h = 6.63 × 10^-34 J·s and m for an electron as 9.11 × 10^-31 kg, the wavelength can be computed as 2.43 × 10^-10 m.
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