A biconvex lens has a focal length 2/3 times the radius of curvature of either surface. The refractive index of lens is:
A. 1.55
B. 1.65
C. 1.75
D. 1.85
Answer:C
A biconvex lens has a focal length 2/3 times the radius of curvature of either surface. The refractive index of lens is:
A. 1.55 B. 1.65 C. 1.75 D. 1.85