Exam-style question
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What does distinguishing Doppler redshift from other wave effects allow astronomers to do?.
- A.Identify the temperature of stars.
- B.Measure the speed of sound in space.
- C.Understand the motion of celestial objects.
- D.Determine the chemical makeup of galaxies.
Model answer
What a good answer should say
- Understand the motion of celestial objects.
Explanation
Why this works
The cause of distinguishing Doppler redshift from other wave effects is the unique way it relates to the relative motion of celestial objects. The mechanism involves analyzing the changes in wavelength due to the motion of these objects towards or away from us.
The effect is that astronomers can accurately determine the speed and direction of these objects, leading to the consequence of a better understanding of the dynamics of the universe.
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