Determine wavelength of the radiation emitted, Chemistry

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 10⁷ m^-1)

(1) 406 nm

(2) 192 nm

(3) 91 nm

(4) 9.1 x 10 ^-8nm

Ans: 91 nm

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