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Home Q & A Board Science-Related Homework Help Physics Astronomy
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john6969 john6969
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5 years ago
Doppler shifted hydrogen absorption lines are seen in the spectrum of a star. The hydrogen line at 656.28 nm is seen to be shifted to 656.08 nm. Is the star moving towards or away from us, or can we not tell?
A) moving towards us
B) moving away from us
C) There is not enough information to determine the answer.
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
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a_sabu2a_sabu2
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5 years ago
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john6969 Author
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5 years ago
Good timing, thanks!
mambah4
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Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
Morgan-C
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2 hours ago
Brilliant ツ
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