Exam-style question
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Which design improvement can reduce spherical aberration in reflecting telescopes?.
- A.Using a parabolic mirror
- B.Increasing the diameter of the mirror
- C.Adding a secondary mirror
- D.Using a larger eyepiece
Model answer
What a good answer should say
- Using a parabolic mirror
Explanation
Why this works
Parabolic mirrors focus light to a single point, reducing spherical aberration compared to spherical mirrors, which can cause light to focus at different points.
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