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 sepectral line emitted when an electron falls from this level to the first excited state.l [ Use h`=6.626xx10^-34)` Js]
A
3R
B
`(5R)/9`
C
`(3R)/(4)`
D
`(8R)/(9)`
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