absorption lines

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absorption lines

In astronomy, dark lines in the spectrum of a hot object due to the presence of absorbing material along the line of sight. Absorption lines are caused by atoms absorbing light from the source at sharply defined wavelengths. Numerous absorption lines in the spectrum of the Sun (Fraunhofer lines) allow astronomers to study the composition of the Sun's outer layers. Absorption lines in the spectra of stars give clues to the composition of interstellar gas and dust.

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1814 Boksenberg, Alexander interstellar matter July 25			Nearly half of the absorption lines found in the Keck spectrum are unidentified. Gamma-ray burst offers first peek at young galaxy's star factory by Asian News International Atomic and molecular absorption lines are very stable under changing environmental conditions and are excellent references for this purpose. NIST demonstrates hybrid wavelength calibration reference. (General ... by Journal of Research of the National Institute of Standards and Technology Characteristic narrow absorption lines, observed at 380 and 435 nm, are most likely from forbidden spin transitions in ferrous iron. Reflection spectrophotometry of green and blue jadeites from ... by Sharp, W.E.; Mandell, Richard D. / Bulletin of the South Carolina Academy of Science			abscess abscissa abscissin abscission absconce Abse, Dannie Absecon Inlet absenteeism Absil, Jean absinthe absolute absolute advantage absolute dating absolute magnitude absolute monarchy absolute music absolute pitch absolute temperature absolute value absolute weight absolute zero absolution absolutism absolutist absorption absorption lines absorption of light absorption spectroscopy abstinence abstract abstract art abstract expressionism abstract noun abstract of title abstraction Abstrakte Oper no. 1 Absurd, Theatre of the Abu Abu ¸abi Abu al-Fida Abu Bakr Abu Dhabi Abu Hanifah, Al-Nu'man Abu Hassan Abû Mâdî, Ilyâ Abu Musa Abu Nidal Abú Nuwás, Hasan ibn Háni Abu Simbel Abu-al-Ala al-Maarri Abubakar, Siddiq			absorption gasoline absorption hygrometer absorption index absorption indicator Absorption isotherm Absorption isotherm Absorption isotherm Absorption isotherm Absorption Isotherm Measurement absorption l absorption l absorption l absorption l absorption l absorption l absorption l's absorption l's absorption l's absorption l's absorption l's absorption l's absorption lacuna absorption lacuna absorption lacuna absorption lens absorption limit Absorption Limiting Frequency Absorption line Absorption line Absorption line absorption lines absorption loss absorption meter Absorption Microscopy absorption modulation absorption nebula absorption nebula absorption nebulae absorption nebulae absorption nebulas absorption nebulas absorption number Absorption of electromagnetic radiation Absorption of Light Absorption of Light absorption of mind Absorption of Sound Absorption of Waves absorption oil Absorption peak Absorption peak Absorption Phase Grating absorption plant absorption process absorption property absorption rate absorption rate absorption rate constant Absorption Rates Absorption Rates absorption ratio

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