Definitions for "Radius of curvature"
With spherical mirrors, the radius of the sphere of which the mirror is a part.
the distance from the center of curvature to the mirror.
twice the focal length. This is the radius of an imaginary sphere that the mirror surface conforms to.
A dimension that is commonly used as a means of describing the camber requirements in a glulam beam.
Joining of two rectilinear stretches, with different geometrical alignments.