Exam-style question
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What principle do radio telescopes operate on?.
- A.Reflection of light
- B.Refraction of light
- C.Detection of radio waves
- D.Absorption of light
Model answer
What a good answer should say
- Detection of radio waves
Explanation
Why this works
Radio telescopes operate on the principle of detecting radio waves emitted by astronomical objects, which allows for the study of phenomena that are not visible in other wavelengths.
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