# The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are :

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The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are :

(1) Paschen and Pfund

(2) Balmer and Brackett

(3) Lyman and Paschen

(4) Brackett and Pfund

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Correct option (3) Lyman and Paschen

Explanation:

Ratio of shortest wavelength of two spectral series wavelength shortest means energy maximum