i'm a newbie to quantum theory so bear with me please :) when hydrogen is heated in a vaccuum, the electron gets excited and moves to a higher energy level right? and then emits light as a spectral line when it moves back down to the lower energy level. my question is, why does it only show up as a line? shouldn't it be a continual spectrum of light between the two energy levels? the energy we see as light is the electron's movement isn't it? (or is that something else?) sorry for all the questions, and thanks if you can help!