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A deuteron and an alpha - partical have ...

A deuteron and an `alpha` - partical have same kinetic energy. Find the ratio of their de-Broglie wavelengths.

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The correct Answer is:
B
`lambda = (h)/(sqrt(2Km) rArr lambda prop (1)/(sqrtm)`
(lambda_b)/(lambda_alpha) = sqrt((m_alpha)/(m_d)) = sqrt((4)/(2)) = sqrt2.`
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