Sentences with phrase «certain absorption lines»

Not exact matches

For example, 59 Cygni is listed as spectral type B1.5 Vnne, [34] indicating a spectrum with the general classification B1.5 V, as well as very broad absorption lines and certain emission lines.

If a certain type of gas produces absorption lines at certain wavelengths when it is in front of a hot background, then when that same type of gas is seen in front of a cooler background, it produces emission lines at the exact same wavelengths.