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Class 10 Science Medium Mcq English Medium

Based on the relationship R = 2f, the principal focus of a spherical mirror lies

Question
Based on the relationship R = 2f, the principal focus of a spherical mirror lies
at the pole itself
midway between the pole and the centre of curvature
beyond the centre of curvature
at infinity always
Answer
midway between the pole and the centre of curvature
Detailed Explanation
Since R = 2f, the principal focus lies exactly midway between the pole and the centre of curvature.
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