The spectrum of a star shows the 656 nm absorption line shifted to 654 nm. Which of the following can we conclude about this star?
A) The star is approaching us with an approximate speed of 1,800 km/sec.
B) The star is receding with an approximate speed of 1,800 km/sec.
C) The star is approaching us with an approximate speed of 900 km/sec.
D) The star is receding with an approximate speed of 900 km/sec.
E) The star is spinning rapidly.
Correct Answer:
Verified
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