Exam-style question
Try this first
Which of the following best describes apparent brightness?.
- A.The intrinsic brightness of a star
- B.The brightness of a star as seen from Earth
- C.The total energy output of a star
- D.The temperature of a star's surface
Model answer
What a good answer should say
- The brightness of a star as seen from Earth
Explanation
Why this works
Apparent brightness refers to how bright a star appears from our perspective on Earth, which can be influenced by distance and other factors, unlike luminosity which is an absolute measure.
Common mistake
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