Exam-style question
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How does increasing the diameter of a telescope affect its collecting power?.
- A.It decreases the collecting power.
- B.It has no effect on collecting power.
- C.It increases the collecting power.
- D.It only affects the telescope's weight.
Model answer
What a good answer should say
- It increases the collecting power.
Explanation
Why this works
Increasing the diameter of a telescope increases its collecting power, allowing it to gather more light and improve the quality of observations.
Common mistake
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