An Etymological Dictionary of Astronomy and Astrophysics

4 terms — R › RY

R RA RC RE RÉ RH RI RO RR RU RY

rydberg   رودبَری   rydberg (#) Fr.: rydberg A unit of energy used in atomic physics, equal to about 13.6 electron-volts, the ionization potential of hydrogen. See also: In honor of the Swedish physicist Johannes Robert Rydberg (1854-1919), who did important contributions on spectroscopy, and in particular found a relatively simple expression relating the various lines in the spectra of chemical elements (1890).

Rydberg constant   پایای ِ رودبَری   pâyâ-ye Rydberg (#) Fr.: constante de Rydberg A fundamental constant of atomic physics appearing in the → Rydberg formula. The Rydberg constant for hydrogen is 109,739 cm-1. See also: → rydberg; → constant.

Rydberg correction   ارشایش ِ رودبَری   aršâyeš-e Rydberg Fr.: correction de Rydberg A term inserted into a formula for the energy of a single electron in the outermost shell of an atom to take into account the failure of the inner electron shells to screen the nuclear charge completely. See also: → rydberg; → correction.

Rydberg formula   هموگش ِ رودبَری   hamugeš-e Rydberg Fr.: formule de Rydberg A formula, used in atomic physics, which describes the wavelengths or frequencies of light in various series of related spectral lines, such as those emitted by hydrogen atoms. See also: → rydberg; → formula.