Exam-style question
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Calculate the collecting power of a telescope with an aperture of 2 meters compared to one with an aperture of 1 meter.
Model answer
What a good answer should say
- The collecting power of the 2-meter telescope is four times greater than that of the 1-meter telescope.
Explanation
Why this works
This answer is strong as it applies the formula for collecting power, which is proportional to the square of the aperture diameter. The question tests the ability to apply mathematical reasoning to a physical concept.
Common mistake
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