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Q: The focal length of a spherical mirror is ........
  • A. double its radius of curvature
  • B. three times its radius of curvature
  • C. half of its radius of curvature
  • D. its radius of curvature
Correct Answer: Option C - The focal length of a spherical mirror is half of its radius of curvature.
C. The focal length of a spherical mirror is half of its radius of curvature.

Explanations:

The focal length of a spherical mirror is half of its radius of curvature.