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From Davisson-Germer experiment an `alpha` particle and a proton are accelerated through the same `pd V`. Find the ratio of the de Broglie wavelengths

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From Davisson-Germer experiment an `alpha` particle and a proton are accelerated through the same `pd V`. Find the ratio of the de Broglie wavelengths associated with them
A. `1:2sqrt2`
B. `2sqrt2:1`
C. `1:sqrt2`
D. `sqrt2:1`
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1 Answer

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Correct Answer - A
`lambda=h/p=h/sqrt(2mq V)`
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