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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsNuclear physicsMedium2 minPYQ_2014

PhysicsMediumsingle choice

A neutron is moving with velocity $u$ . It collides head on and elastically with an atom of mass number $A$ . If the initial kinetic energy of the neutron is $E$ , then how much kinetic energy will be retained by the neutron after reflection?

Options:

Answer:

Solution:

Fraction retained by nucleus
$(\frac{Δ k}{k})_{retained} = (\frac{m _{2} - m _{1}}{m _{1} + m _{2}})^{2} = (\frac{A - 1}{A + 1})^{2}$ After collision kinetic energy retained by neutron $(\frac{A - 1}{A + 1})^{2} E$

Stream:VITEEESubject:PhysicsTopic:Modern PhysicsSubtopic:Nuclear physics

⏱ 2mℹ️ Source: PYQ_2014

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