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Question

De Broglie wavelength of neutrons in thermal equilibrium is (given mn=1.6×1027kg)

A
30.8/ToA
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B
3.08/ToA
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C
0.308/ToA
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D
0.0308/ToA
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Solution

The correct option is A 30.8/ToA
The de Broglie wavelength, λ=h2mkT where h= Planck's constant, m= mass of the particle , k= Boltzmann's constant, T= temperature.

So, λ=6.62×10342×(1.6×1027)×(1.38×1023)T=31.5×1010m/T30.8/TAo

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