Question

  The radii of curvature of the faces of a double convex lens are 20 cm and 30
cm. If focal length of the lens is 36 cm find the refractive index of the material of the lens?

A 1.33 cm
B 1.2 cm
C 1.5 cm
D 1.7 cm
Practice Next

Relevant for Exams:

Hey! Ask a query