With reference to a spherical mirror, which of the following do(es) not depend on whether the rays are paraxial or not?

Step-by-step solution

The radius of curvature, pole, and principal axis are intrinsic geometric properties of a spherical mirror. They are defined by the physical shape and structure of the mirror itself and are entirely independent of the incident light rays. The focus, however, is the point where rays parallel to the principal axis converge (or appear to diverge from) after reflection. For paraxial rays (rays close to the principal axis), they converge at a single well-defined point called the principal focus. For marginal rays (rays