Red shift question
Physics and electronics discussion, revision, exam and homework help.
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Re: Red shift questionAre you not given a laboratory value for the hydrogen alpha line or are you expected to know it. Anyway you need to use the formula z=-delta lambda/lambda.(Original post by osake)
The galaxy NGC 7320C has a red shift value of z = 0.02.
At what wavelength would you expect to find the hydrogen alpha line in the spectrum of light
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Re: Red shift questionNo, I am not given a laboratory value.(Original post by Augmented hippo)
Are you not given a laboratory value for the hydrogen alpha line or are you expected to know it. Anyway you need to use the formula z=-delta lambda/lambda. -
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In that case it seems that your answer should be 0.02lambda + lambda .....(Original post by osake)
No, I am not given a laboratory value.
For the observed wavelength.
This was posted from The Student Room's iPhone/iPad AppLast edited by xiyangliu; 17-06-2012 at 14:21. -
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Re: Red shift questionIn the mark scheme it says the answer is 669.411 nm, how did they obtain this value?(Original post by xiyangliu)
In that case it seems that your answer should be 0.02lambda + lambda .....
For the observed wavelength.
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Re: Red shift questionYou need more details to answer this - what other values has the question given you?(Original post by osake)
The galaxy NGC 7320C has a red shift value of z = 0.02.
At what wavelength would you expect to find the hydrogen alpha line in the spectrum of light
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Re: Red shift questionI have edited my original post and attached the question, they didn't give any other details.(Original post by EllaBella<3)
You need more details to answer this - what other values has the question given you? -
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Re: Red shift questionGod I haven't got a clue(Original post by osake)
I have edited my original post and attached the question, they didn't give any other details.
Is this A2?!
The only way I could think is z=v/c - find v then use v=f(lambda) - don't know how to get the frequency though Sorry, haven't been any help!
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Re: Red shift question[QUOTE=xiyangliu;38173203][QUOTE=EllaBella
Hm... I dnt think v = f(lambda) is necessary since v is the speed of the moving object
Are u given the distance between earth and that galaxy ??
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I know. You aren't given any details. The question has been attached anyway.
Is this A2?!
