Question : Which measuring instrument consists of a metal triangular frame supported on three legs, used to measure the radius of curvature of an object such as lenses and curved mirrors that are spherical?
Option 1: Viscometer
Option 2: Spherometer
Option 3: Vernier calliper
Option 4: Screw gauge
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Correct Answer: Spherometer
Solution : The correct answer is Spherometer.
A spherometer is a precise tool used to calculate a spherical surface's radius of curvature. A spherometer is a measuring instrument with three legs supporting a metallic triangular frame. The three legs' tips lie on the radius, forming an equilateral triangle.
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