How can line photons have both emission and absorption spectrum at the same time?
http://www.astro.cornell.edu/academics/c… This site briefly explains Kirchhoff’s law for spectroscopy, but you can google it if you need a more thoughough answer. Basically if a gas or substance is hot and dense enough it will give off a continuous spectrum because there are many differeny energy levels that the electrons can occupy, and when they go to lower levels they give off energy. If the object is hot but diffuse only spectral emission lines are produced because there are not enough interactions to make energy levels that “bridge the gap” between emission lines. I won’t explain this fully, but its the interactions that spread out or blurr the emission lines into a continuous spectrum. Finally a cool gas will absorb more energy than it emits, so absorption lines appear. Basically emission of light in a spectrum is a balance between heat energy and photons. If an object is too hot h
