A hydrogen atom ia in excited state of ...

A hydrogen atom ia in excited state of principal quantum number `n` . It emits a photon of wavelength `lambda` when it returnesto the ground state. The value of `n` is

`sqrt(lambdaR(lambdaR-1))`

`sqrt((lambdaR-1)/(lambda))`

`sqrt((lambda)/(lambdaR-1))`

`sqrt(lambda(R-1))`

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