Question

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Answer 1

The line spectra of hydrogen is regarded as a finger print of atom.The line spectrum is obtained by passing an electric discharge through hydrogen gas at low pressure.hydrogen molecule splits up in two atoms these electrons absorb energy and electrons get excited.when these excited electrons come back to ground state they meet electromagnetic radiation to discrete frequencies.now when these emmited radiations are passed through a Prism then a discontinuous line spectrum of several isolated sharp lines is observed.
this line spectrum tells us that the hydrogen spectrum consists of several series of spectral lines name after their discoverers.these series are lyman series Balmer series paachan series brackett series etc..