NEET Physics de Broglie Wavelength MCQ Question
What is the de Broglie wavelength of a neutron (mass = 1.675 × 10^-27 kg) moving with a velocity of 2.0 × 10^3 m/s?
98 × 10^-10 m
31 × 10^-14 m
98 × 10^-12 m
5.29 × 10^-15 m
Correct Answer
Detailed Explanation
The de Broglie wavelength λ is calculated using λ = h/p, where p = mv. Substituting h = 6.63 × 10^-34 Js, m = 1.675 × 10^-27 kg, and v = 2.0 × 10^3 m/s gives λ = 1.98 × 10^-10 m.
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