A plano-convex lens of unknown material and unknown focal length is given. With the help of a spherometer we can measure the,

A refractive index of the material

B focal length of the lens

C radius of curvature of the curved surface

D aperture of the lens

The answer is C.

Solution

A spherometer is used to measure the radius of curvature of a curved (spherical) surface, such as the curved face of a plano-convex lens.

Concept Spherometer - measurement of radius of curvature

89 questions from this chapter have appeared across 25 exam years.