October 17, 2013.
Lecture 12 - Using spectroscopy to understand celestial
Interaction Light – Matter
What is the energy of the emitted photon?
o Less than that of the absorption because energy is required to make the jump
How many absorption lines would we see in the spectrum if we had many atoms with
Absorption and emission lines are fingerprints
We can determine the makeup of faraway celestial bodies through these fingerprints