Dual Nature of Radiation and Matter - Result Question 5

5. The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is :-[2017]

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======= ####5. The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is :-[2017]

c3eec34ec6b1fad69db54a20ad4b2dca40c2aa54 (a) h3mkT

(b) 2h3mkT

(c) 2hmkT

(d) hmkT

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Answer:

Correct Answer: 5. (a)

Solution:

  1. (a) We know that,

de-Broglie wavelength λ=p=h2m(KE)

K.E. of thermal neutron =32kT

=h2m(32kT)

λ=h3mkT



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