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An electron of kinetic energy K collides...

An electron of kinetic energy K collides elastically with a stationary hydrogen atom in the ground state. Then,

A

must be elastic

B

must be completely incleastic

C

may be partially elastic

D

information is insufficient

Text Solution

Verified by Experts

The correct Answer is:
A
For a collisiomof neutron with hydrogen atom in ground state to be inelastic (partical or complete). The minimum `KE` or striking neutron must be `20.4 eV. [This condition is derivedin theory.] ltbgt As the energy of the given incident neutron is less than `2.4 eV`, the collsion must be elastic.
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