Question

Calculate the wavelength and energy in eV of a photon emitted when in a hydrogen atom an electron makes a transition from the third excited state to the ground state. R= 1.097*10⁷ m⁻¹, c = 3*10⁸ ms⁻¹ and h = 6.625*10⁻³⁴ Js [Ans: 9.27*10⁻⁸ m,12.76 eV]

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