Answer:
White light passes through a cool cloud of gas an absorption line spectrum is formed.
Explanation:
An absorption line spectrum appears if an material that absorbs the light is placed between a source material like cloud of gas , layers of star and the observer. A cloud which is built up of gas comprises of atoms. A typical gas cloud in space contains a lot of hydrogen ([tex]H_2[/tex]) and helium (He) and also traces of heavier elements like nitrogen, carbon, oxygen and perhaps iron. The atoms that is present inside the cloud of gas contains a nucleus with positively charged protons and no charge neutrons.This nucleus is Surrounding by 1 or more electrons. As we that electron is the primary source for stellar spectrum, when we pass white light through the gas cloud am absorption spectrum is produced .
