Hydrogen atom from excited state comes to the ground state by emitting a photon of wavelength λ. The value of principal quantum number ‘n’ of the excited state will be, (R: Rydberg constant)
1
\(\rm \sqrt{\frac{λR}{λ-1}}\)
2
\(\rm \sqrt{\frac{λR}{λR-1}}\)
3
\(\rm \sqrt{\frac{λ}{λR-1}}\)
4
\(\rm \sqrt{\frac{λR^2}{λR-1}}\)