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The wavelength of the radiation emitted ...

The wavelength of the radiation emitted , when in a hydrogen atom electron falls from infinity to stationary state 1 , would be :
(Rydberg constant = `1.097 xx 10^(7) m^(-1)`)

A

91 nm

B

192 nm

C

406 nm

D

`9.1xx10^(-8) nm`

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The correct Answer is:
A
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