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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 $= 1.097 \times 10^{τ} m^{- 1}$ )

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91 nm

192 nm

406 nm

9.1 \times 10^{- 6} nm

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detailed solution

Correct option is A

It is known that;

$\frac{1}{λ} = R_{H} [\frac{1}{1^{2}} - \frac{1}{\infty^{2}}]$

$\Rightarrow λ = 912 Å$

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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 =1.097×10τm−1)