A radioactive nucleus of mass number A , initially at rest, emits on α -particle with a speed v . What will be the recoil speed of the daughter nucleus?

Question

A radioactive nucleus of mass number A , initially at rest, emits on α -particle with a speed v . What will be the recoil speed of the daughter nucleus?, 2 v ( A - 4 ), 2 v ( A + 4 ), 4 v ( A - 4 ), 4 v ( A + 4 )

MARKS App · Accepted Answer

As per conservation law of momentum 0 = 4 v + A - 4 v r ∴ R ecoil speed v r = 4 v ( A - 4 )

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