Question

An important line in the absorption spectrum of stars occurs at a wavelength of 656nm for stars at rest. Imagine that you observe five stars (A-E) from Earth and discover that this absorption line is at the wavelength shown in the table below for each of the five stars.

STAR	Wavelength of Absorption line
A	649 nm
B	660 nm
C	656 nm
D	658 nm
E	647 nm

Based on the information in the table above, which of the following is the most accurate ranking of the speed of the stars from moving fastest toward Earth to moving fastest away from Earth.

Question 73 options:

	E, D, C, B, A
	C, E, A, D, B
	A, B, C, D, E
	E, A, C, D, B
	B, D, C, A, E

Answer 1