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Find the recoil speed of a hydrogen atom...

Find the recoil speed of a hydrogen atom after it emits a photon in going from n = 5 state to n = 1 state `(R=1.097xx10^(7) m^(-1))` :

A

`2.4 ms^(-1)`

B

`4.18 ms^(-1)`

C

`3.2 ms^(-1)`

D

`6.4 ms^(-1)`.

Text Solution

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The correct Answer is:
B
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