Exam-style question
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How does the distance modulus relate to the distance of a star in parsecs?.
- A.It is directly proportional to the distance.
- B.It is inversely proportional to the distance.
- C.It is equal to the distance in parsecs.
- D.It is the logarithm of the distance.
Model answer
What a good answer should say
- It is directly proportional to the distance.
Explanation
Why this works
The distance modulus indicates how much dimmer a star appears compared to its intrinsic brightness, and this relationship is directly proportional to the distance in parsecs.
Common mistake
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