Physics · Light - Reflection and Refraction

For a spherical mirror of small aperture, the focal length (f) is approximately equal to:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1Quarter the radius of curvature
2Half the radius of curvature✓
3Twice the radius of curvature
4Four times the radius of curvature

Correct answer

Half the radius of curvature

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For a spherical mirror of small aperture, the focal length (f) is approximately equal to:

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