The relation between focal length f and radius of curvature R for a sp…

Question

The relation between focal length f and radius of curvature R for a spherical mirror is:

Accepted Answer

C. f = R/2 (paraxial approximation)

For a spherical mirror under the paraxial approximation, **f = R/2**.
Concave (converging) has positive R/2 in magnitude
sign depends on convention (f negative in Cartesian convention for a concave mirror with its centre of curvature on the object side).

Answer

f = R

Answer

f = 2R

Answer

f = R/4

The relation between focal length f and radius of curvature R for a spherical mirror is:

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