the spectrum of a star in visible and UV region has wavelengths as 824,970,1120,2504,5173,6100A0 . Which of these lines cant belong to H -atom spectrum ? given 1/R = 970A0

We know that the Balmer series of hydrogen spectrum lies in the visible region.

Wavelength limits of Balmer series is 3646 A0 to 6563 A0

and also paschen series lies in the infrared region.

Wavelength limit=8220 A0to 18751A0

Therefore from the given wavelengths, 824,970,1120,2504 can not belong to the hydrogen spectrum.

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