Exam-style question
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What is a key observational feature of quasars?.
- A.They emit strong radio waves.
- B.They have a low luminosity.
- C.They are always stationary.
- D.They are cooler than stars.
Model answer
What a good answer should say
- They emit strong radio waves.
Explanation
Why this works
Quasars are known for their strong emissions across the electromagnetic spectrum, particularly in radio wavelengths, indicating their high energy and luminosity.
Common mistake
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