NEET Questions Solved

NEET - 2011

A radioactive nucleus of mass M emits a photon

of frequency ν and the nucleus recoils. The recoil

energy will be

(a) h2ν2/2 Mc2

(b) zero

(C) hν

(d) Mc2-

Momentum of photon

          p=c

Hence, Recoil energy

        E=P22ME=c22M

or            E=c22M

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