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Home Q & A Board Science-Related Homework Help Physics
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Tsync Tsync
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8 years ago
If the rest wavelength of a certain line is 600 nm, but we observe it at 594 nm, then:
A) the source is approaching us at 0.1 % of the speed of light.
B) the source is receding from us at 10% of the speed of light.
C) the source is spinning very rapidly, at 1% of the speed of light.
D) the source is getting 1% hotter as we watch.
E) the source is approaching us at 1 % of the speed of light.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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#2
8 years ago
You answered my question so timely, I really value that, thank you
Minoring in physics
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#3
8 years ago
Slight Smile
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