Physicseasy · Past Paper
What is the relation between the focal length (f) and the radius of curvature (R) of a spherical mirror?
Af = 2R
Bf = R
Cf = R/2
Df = R/4
✓ Correct Answer: C — f = R/2
For spherical mirrors with small apertures, the focal length is exactly half of the radius of curvature.
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