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Physics · 2017
JEE Main 2017 · 2017-04-02 Offline · Q24
A particle A of mass m and initial velocity v collides with a particle B of mass m/2 which is at rest. The collision is head on, and elastic. The…
A particle A of mass m and initial velocity $\displaystyle v$ collides with a particle B of mass $\displaystyle \frac{\mathrm{m}}{2}$ which is at rest. The collision is head on, and elastic. The ratio of the de-Broglie wavelengths $\displaystyle \lambda_{\mathrm{A}}$ to $\displaystyle \lambda_{\mathrm{B}}$ after the collision is :
Official answer
(2)
$\displaystyle \frac{\lambda_{\mathrm{A}}}{\lambda_{\mathrm{B}}}=2$
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JEE Main 2017 Physics question, with the answer from NTA’s final answer key. Where our answers come from.