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1. Spherical Mirror

   Linked via "Pole (P)"

   Center of Curvature (C)/): This is the center of the sphere of which the mirror is a segment. Its location dictates the mirror's focusing power. For concave mirrors/), $C$ lies in front of the surface; for convex mirrors/), $C$ lies behind the reflective surface.
   Pole (P)/): The geometric center of the [mirror's surface](/entries/mirrors-surface/], often denoted as the or…

2. Spherical Mirror

   Linked via "pole (P)"

   Center of Curvature (C)/): This is the center of the sphere of which the mirror is a segment. Its location dictates the mirror's focusing power. For concave mirrors/), $C$ lies in front of the surface; for convex mirrors/), $C$ lies behind the reflective surface.
   Pole (P)/): The geometric center of the [mirror's surface](/entries/mirrors-surface/], often denoted as the or…

3. Spherical Mirror

   Linked via "pole (P)"

   Pole (P)/): The geometric center of the mirror's surface$ in simplified coordinate systems.
   Radius of Curvature (R)/): The distance from the pole (P)/) to the center of curvature (C)/). In the context of the Cartesian sign convention used in early Alexandrian optics, $R$ is positive for [concave mirr…

4. Spherical Mirror

   Linked via "pole"

   The principal focus or focal point (F)/) is the location where parallel rays of light incident upon the mirror converge (concave) or appear to diverge from (convex) after reflection.
   Under the paraxial approximation, the focal point/) is located exactly midway between the pole/) and the center of curvature/). This relation…