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The angular momentum of an electron in a...

The angular momentum of an electron in a Bohr's orbit of `He^(+)` is `3.1652xx10^(-34)` kg-`m^(2)`/sec. What is the wave number in terms of Rydberg constant (R ) of the spectral line emitted when an electron falls from this level to the first excited state. [ Use h`=6.626xx10^-34` Js]

A

`3R`

B

`(5R)/(9)`

C

`(3R)/(4)`

D

`(8R)/(9)`

Text Solution

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The correct Answer is:
B
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