The position of an absorption or emission line is useful in determining the ____.
A) temperature of an object
B) distance to an object
C) chemical composition of an object
D) motion of an object across the observer's line of sight
E) motion of an object toward or away from the observer

Question

Quizplus · Accepted Answer

The chemical composition of an object can be determined by the position of an absorption or emission line.

The Position of an Absorption or Emission Line Is Useful