Question

The focal length of the plano convex lens is 2r then its refractive index is ?

Answer 1

Meaning and definitions of convincing, translation in Hindi language for convincing with similar and opposite words. Also find spoken pronunciation of convincing in Hindi 

Answer 2

· The focal length of the plane convex lens is 2R where R is the radius of cu. The focal length of the plane convex lens is 2R where R is the radius of curvature of the surface then the refractive index of the material of the lens is.