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An electron in H atom makes a transition...

An electron in `H` atom makes a transition from `n = 3 to n = 1`. The recoil momentum of the `H` atom will be

A

`6.45 xx10^(-27) Ns`

B

`6.8xx10^(-27)Ns`

C

`6.45xx10^(-24)Ns`

D

`6.8xx10^(-24)Ns`

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The correct Answer is:
A
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