22. A line passing through the center of curvature and vertex of a mirror.
a.principal axis b.focus c.focal length d.center of Curvature
23.Midway between the vertex and the center of curvature of a mirror.
a.principal axis b.focus c.focal lenght d. vertex
24.the distance from the vertex of a mirror to the focus or focal point.
a.principal axis b.focus c. focal length d.vertex
25.the point in the center of a sphere from which the mirror was taken.
a.pricipal axis b.focus c.focal length d.vertex
26.the point on the mirrro'rs surface where the principal axis meets the mirror.
a.principal axis b.Focus c. focal length d. vertex​