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Electromagnetic radiation hydrogen spectrum

The name of Johann Jakob Balmer is immortalized in the Balmer series of spectral lines emitted from the hydrogen atom. Atoms that are excited to higher energies return to lower energies by emitting electromagnetic radiation at specific frequencies. Gustav Kirchhoff had shown in 1859 that each element has its own unique spectrum, but attempts to predict the frequencies of these spectral lines were tmsuccessful until Balmer. [Pg.131]

Pure rotational transitions, which give spectra in the far infrared and radio regions, will be considered first. A molecule can only absorb electromagnetic radiation if it can interact with the oscillating electric field associated with the radiation. If a molecule has a permanent dipole moment, this dipole oscillates as rotation occurs, and a pure rotational spectrum is obtained. This is the case with molecules such as carbon monoxide (CO) and hydrogen chloride (HCl), which have permanent dipole moments. Molecules such as H2 and N2, which do not have permanent dipole moments, do not have pure rotational spectra. [Pg.66]

Lamb shift A small energy difference between two levels ( Si/2 and Pi/2) in the hydrogen spectrum. The shift results from the quantum Interaction between the atomic electron and the electromagnetic radiation. [Pg.459]


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See also in sourсe #XX -- [ Pg.530 , Pg.532 , Pg.533 , Pg.535 ]




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