Hydrogen Emission Spectrum

Which of the following transitions are not allowed in the normal electronic emission spectrum of an atom?

How many spectral series appear in the emission spectrum of atomic hydrogen?

Exercise Questions|Intensity|Photocurrent|Note|Exercise Questions|Emission And Absorption Spectrum|Continuous Spectrum|Emission Spectrum|Line Spectrum|Absorption Spectrum|Summary

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The wave number of the spectral line in the emission spectrum of hydrogen will be equal to (8)/(9) times the Rydberg's constant if the electron jumps from …………..:-

In photons of energy 12.75 eV are passing through hydrogen gas in ground state then no. of lines in emission spectrum will be