View Full Version : Ep. 139: Energy Levels and Spectra

2009-Jun-22, 08:20 PM
Last week we took a peek into the tiny world of quantum mechanics, and its unintuitive, but very accurate mathematical predictions. And although we all appreciate the physics lesson, you're probably wondering what this all has to do with astronomy. Well, today we bring it all home and explain how quantum mechanics has given astronomers one of the most powerful tools they have to study the nature of the cosmos.http://feeds.feedburner.com/~r/astronomycast/~4/E4gSO-7-tB0

More... (http://feedproxy.google.com/~r/astronomycast/~3/E4gSO-7-tB0/)

2009-Jul-11, 01:26 AM
oops ... newbie ... should have put my question here ...

Hi Fraser n Pamela ...

I really love your show ... great format and content.

My question: "When we analyse spectra from a distant object, how can we tell what spectral characteristics can be attributed to the emitting source, and what characteristics are a result of changes to the spectra caused by the emitted photons travelling though a media like a molecular or gas cloud?"

Thank You,
brendan o'brien