Question

A spherometer measures the ___ of a circle.

(a) The radius of curvature of a curved surface
(b) The radius of a circle
(c) The radius of an arc
(d) The radius of a round peg

Answer 1

A spherometer measures the radius of curvature of a curved surface.

Step-by-step explanation:

A spherometer measures the radius of curvature of a curved surface. The radius of curvature is the radius of a circular path. When a circle is rotated through an angle, the arc length is the distance traveled along the circumference of the circle. The radius of curvature is a crucial measurement in determining the curvature of a surface.