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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 x 10 7 m-1)
(1) 406 nm
(2) 192 nm
(3) 91 nm
(4) 9.1 x 10 -8nm
Ans: 91 nm
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