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A nucleus of mass M at rest splits into two parts having masses (M')/3 and (2M')/3 (M'<M). The ratio of de Broglie wavelength of two parts will be

Asked in JEE Main 26th July 2nd Shift 2022 · Splitting and decay

Answer: (3) 1:1

Step-by-step solution

The parent is at rest, so total momentum is zero.

The two fragments therefore carry equal and opposite momenta, |p₁|=|p₂|.

λ=/hp depends on momentum alone, not on mass.

The ratio is 1:1.

Why the other options are wrong

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