A star's emission line of 656 nm appears shifted to 649 nm in the spectrum. What can you conclude from this shift?
A) The star is approaching you with the speed of 3,200 km/s.
B) The star is receding from you with the speed of 3,200 km/s.
C) The star is approaching you with the speed of 320,000 km/s.
D) The star is receding from you with the speed of 320,000 km/s.
Correct Answer:
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