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Perfectly Elastic Collision

The allowed m...

Question

The allowed momenta are given by

\frac{n h}{2 L}

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\frac{n h}{L}

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\frac{n h}{2 Π L}

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\frac{n h}{4 L}

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Solution

The correct option is A $\frac{n h}{2 L}$
From Bohr-Sommerfeld Quantization condition given in the paragraph, for a back and forth motion.
$P \times 2 L = n h$ , where P is the momentum,
$P = \frac{n h}{2 L}$

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