## Balmer seriesThe transition from the third level to the second level yields the red H-alpha emission line at 6563 Å; H-beta is in the green part of the spectrum at 4861 Å, H-gamma is in the violet (as are higher members of the series) at 4342 Å, and H-delta at 4101 Å. The Balmer jump is the relatively
abrupt decrease in a continuous spectrum
at about 3650 Å caused by hydrogen absorption lines in the Balmer series
crowding to their series limit. A formula developed by Balmer in 1884 relates the frequencies of these lines to one another. In terms of wavelength λ, the formula iswhere R is Rydberg's constant, whose value is approximately 1.097
× 10^{7} m^{-1}, and n is 3, 4, 5, 6, or 7
for the five lines studied by Balmer. ## Related categories• SPECTRA AND SPECTROSCOPY• ATOMIC AND NUCLEAR PHYSICS | ||||||

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