Question

Give reason for three legs of spherometer

Answer 1

a spherometer is an instrument for the precise measurement of the radius of curvature of a sphere or a curved surface. Originally these instruments were primarily used by opticians to measure the curvature of the surface of a lenc

Answer 2

Spherometers have three legs that form an equilateral triangle. Recall from geometry that three points determine a plane, so the three legs will always touch the glass. A central point is attached to a micrometer screw that can be raised or lowered.