The radius of curvature of the constituent parts of the mirror means the radius "c" of the arc of the circle which most closely approximates to the curved form of the part in question.
The radius of curvature of the constituent parts of the mirror means the radius "c" of the arc of the circle which most closely approximates to the curved form of the part in question.2.1.1.13. "Class of mirror" means all devices having one or more common characteristics or functions. They are classified as follows: