#Spectra line series#

Depending on the exact physical interaction (with molecules, single particles, etc.) the frequency of the involved photons will vary widely, and lines can be observed across all the electromagnetic spectrum, from radio waves to gamma rays.ДЄstronomers can use the light of a star filtered through the atmosphere of a planet to infer the chemical composition of the planet to determine if conditions for life are possible there. Mechanisms other than atom-photon interaction can produce spectral lines. Isomer shift is the displacement of an absorption line due to the absorbing nuclei having different s-electron densities from that of the emitting nuclei. Spectral lines also depend on the physical conditions of the gas, so they are widely used to determine the chemical composition of stars and other celestial bodies that cannot be analyzed by other means, as well as their physical conditions such as temperature. Several elements were discovered by spectroscopic means - helium, thallium, cerium, etc. This will be an emission line.ДЄbsorption and emission lines are highly atom-specific, and can be used to easily identify the chemical composition of any medium capable of letting light pass through it (typically gas is used).

If the observer sees the gas, but not the original photon source, then the observer will see only the photons reemitted in a narrow frequency range. If the gas is between the photon source and the observer, a decrease in the intensity of light in the frequency of the incident photon will be seen, as the reemitted photons will mostly be in directions different from the original one. The direction of the new photons will not be related to the direction of travel of the original photon.Дepending on the geometry of the gas, the photon source and the observer, either an emission line or an absorption line will be produced. Then it will be spontaneously re-emitted, either in the same frequency as the original or in a cascade, where the sum of the energies of the photons emitted will be the same as the energy of the one absorbed. When a photon has exactly the right energy to allow a change in the energy state of the system (in the case of an atom this is usually an electron changing orbitals), the photon is absorbed. Dividing the line spectrum into frequency or time slots allows a predetermined number of subscribers to access a common communication line. The wavelengths of the lines are characteristic.

#Spectra line series#

Spectral lines are the result of interaction between a quantum system (usually atoms, but sometimes molecules or atomic nuclei) and single photons. atoms is known as a line spectrum, because the radiation (light) emitted consists of a series of sharp lines. A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from an excess or deficiency of photons in a narrow frequency range, compared with the nearby frequencies.