Exam-style question
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What is the primary function of the objective lens in an astronomical telescope?.
Model answer
What a good answer should say
- The objective lens gathers light from distant objects and focuses it to form a real image.
Explanation
Why this works
This answer is strong because it clearly defines the role of the objective lens in the context of an astronomical telescope, emphasizing its function in image formation. The question tests understanding of optical principles related to telescopes.
Common mistake
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