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# absorption and emmission lines from distant stars

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1. absorption and emmission lines from distant stars
what dictates whether we get absorption lines or emission lines?
2. Re: absorption and emmission lines from distant stars
With stars we usually get absorption lines, with other bodies such as nebula we get emission lines. have a look here for more info:
http://www.astronomynotes.com/light/s5.htm
3. Re: absorption and emmission lines from distant stars
Well that would depend on the equpment we are using to look at the stars. But absorption lines are just the negative of emmission lines, so if you have one, we can easily produce the other.

Is there anymore context to your question?
4. Re: absorption and emmission lines from distant stars
(Original post by Fleming92)
Well that would depend on the equpment we are using to look at the stars. But absorption lines are just the negative of emmission lines, so if you have one, we can easily produce the other.

Is there anymore context to your question?
no not really thats pretty much my question its just that my teacher was telling us we receive absorption line spectrums from stars if theres gas and dust obstructing our view of the star and emission line spectra when theres no obstruction is this true?
5. Re: absorption and emmission lines from distant stars
I think your teacher's right - the gas and dust particles would absorb some of the light, so you would get absorbtion line spectra.
6. Re: absorption and emmission lines from distant stars
thanks for all your comments guys, i think i get it now

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Last updated: May 18, 2012
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