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Publish On: 2019-05-24

Peter

Total Post: 504

Question: Define spectral series

Reply On: 2013-10-09

lala singh

Total Post: 22

ANS: Define spectral series

The spacing between the lines within certain sets of the hydrogen spectrum decreases in a regular way. Each of these sets is called a spectral series.

Balmer was the first to observe one such spectral series in the visible region of the hydrogen spectrum. It is called Balmer series and is shown in fig. the spectral line with largest wavelength, 653.6 nm in the red region is called Ha line, the next line with 𝜆 = 486.1 nm in the blue, green region is called Hβ line, the next line with 𝜆 = 434.1 nm in violet region is called Hγ line and so on. The spacing of successive lines and their intensity goes on decreasing.

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