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#ATOMIC SPECTRA LIGHT ENERGY AND ELECTRON STRUCTURE SERIES#

The Balmer formula when written in terms of frequency of light is.

#ATOMIC SPECTRA LIGHT ENERGY AND ELECTRON STRUCTURE SERIES#

The Lyman series is in the ultraviolet region while Paschen and Brackett's series are found in the infrared region.There are other series of spectra for hydrogen which was discovered after their discoverers such as Lyman, Paschen, Brackett, and Pfund series, and these are represented by the given formulae:.Beyond this limit, no further distinct lines appear, and instead, only a faint continuous spectrum is seen. When n = ∞ is considered, one obtains the limit of series at λ = 364.6 nm and this is the shortest wavelength in the entire Balmer series.

This is also known as the Balmer formula.

In the above formula, λ is the wavelength while R is known as the Rydberg constant and n can have integral values like 3, 4, 5, etc.

Balmer formulated a simple empirical formula for the observed wavelengths is :.

As the wavelength decreases, the lines appear closer together and are weaker in intensity.

The Balmer series in the emission spectrum of hydrogen is given as follows.

The third line with a wavelength of 434.1 nm in the violet is known as and so on.

The line with the longest wavelength 656.3 nm in the red is known as H∞.

The first spectral series was observed by a Swedish schoolteacher named Johann Jakob Balmer n the visible region of the hydrogen spectrum and this series is known as the Balmer series.

At first sight, there might not be any resemblance of order or regularity in spectral lines but the spacing between the lines within certain sets of hydrogen spectrum decreases regularly and each of these sets is known as spectral series. For instance, hydrogen is the simplest atom and thus, it has the simplest spectrum. The frequencies of the light emitted by a particular element exhibit a regular pattern.

This is known as the absorption spectrum of the material of the gas.

Absorption Spectrum: When white light passes through gas and after analyzing the transmitted light using a spectrometer, we find dark lines in the spectrum correspond precisely to those wavelengths that are found in the emission line spectrum of the gas.

The study of emission line spectra of material helps us to identify the gas by serving as a type of fingerprint.