Labels:monitor | web site | window OCR: Penguin Dictionary of Astronomu Contents Index Back History absorpti ion line sharp dip in intensity over narrow wavelength range it continuous spectrum spectrum produced by a typical spectrograph in which the light passes through narrow slit before being dispersed, absorption lines have the appearance of dark lines cutting across at right angles to the direction or dispersion Adsorption lines are characteristic of the spectra. of the majority of stars. In the case of the Sun, they are known as Fraunhofer lines. Atoms are able to absort radiation at a number of precise wavelengths. The wavelengths at which absorption occurs are different for each chemical element making possible to identify the elements present in star or other celestial body by analysing which spectral lines are present T ...
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