Q 12-11-112JEE MainJEE Main 2022 (26 Jul, Shift 2)Easy
A nucleus of mass $M$ at rest splits into two parts having masses $\dfrac{M'}{3}$ and $\dfrac{2M'}{3}$ $(M' < M)$. The ratio of de Broglie wavelengths of the two parts will be
Answer: (C) $1 : 1$
Momentum is conserved from rest, so the two parts have equal and opposite momenta. Since $\lambda = \dfrac hp$, the wavelengths are equal: $1 : 1$.
Solution by Sreeraj P, M.Sc Physics