Hydrogen Spectrum
(1) The hydrogen spectrum is an example of the line emission spectrum or an atomic emission spectrum.
(2) When the electric discharge is passed through the hydrogen gas at low pressure, a bluish light is emitted from it.
(3) This light shows the discontinuous line spectrum of several isolated sharp lines through the prism.
(4) All these lines of H-spectrum contain Lyman, Balmer, Paschen, Barckett, Pfund and Humphrey series in order. These spectral series were named by the name of scientist discovered them.
(5) To calculate the wavelength of various H-lines Ritz introduced the following expression,
R is the universal constant hear generally known as Rydberg's constant its value is 109, 678 cm-1.
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