Sentences with phrase «dark absorption lines»

Superimposed on the spectrum were dark absorption lines, caused by gases in a cloud somewhere between the burst and Earth — about 7 billion light - years from Earth, according to astronomers at Caltech.

Not exact matches

A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.

The solar spectrum of the sun consists of a roughly black body like thermal continuum spectrum, peaking at around 0.5 microns wavelength (plotted on wavelength scale; not wave number), and overlaid with the Fraunhoffer lines of either bright atomic spectral lines, due to elements in the sun, or dark atomic absorption lines, due to absorption of elements in the solar outer atmosphere.

These dark lines are called «absorption lines.»