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Home Q & A Board Science-Related Homework Help Physics Astronomy
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killian killian
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10 years ago
Laboratory measurements show hydrogen produces a spectral line at a wavelength of 486.1 nanometers (nm). A particular star's spectrum shows the same hydrogen line at a wavelength of 486.0 nm. What can we conclude?
A) The star is moving toward us.
B) The star is moving away from us.
C) The star is getting hotter.
D) The star is getting colder.
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padrepadre
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10 years ago
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killian Author
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#2
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10 years ago
Thanks sir, this is for my astronomy class
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