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 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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