Exam-style question
Try this first
What is a primary reason for using X-ray telescopes in space?.
- A.They can observe visible light more effectively
- B.They are less expensive to build than optical telescopes
- C.X-rays cannot penetrate the Earth's atmosphere
- D.They provide better color images of celestial bodies
Model answer
What a good answer should say
- X-rays cannot penetrate the Earth's atmosphere
Explanation
Why this works
The cause is that X-ray radiation is absorbed by the Earth's atmosphere. The mechanism is that the atmosphere blocks X-rays, preventing them from reaching ground-based telescopes.
The effect is that ground-based observations of X-ray emissions from celestial objects are impossible. Consequently, X-ray telescopes must be placed in space to detect these emissions accurately.
Common mistake
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