Question

The radii of curvature of the faces of a double convex lens are 10 cm and 15 cm and its focal length 12 cm .what is the refractive index of glass?

Answer 1

Using the lens makers formula:

here for convex lens, R1 = 10 cm, R2 = -15 cm
Solving the above equation we get
Refractive index of the material of the lens, n =1.5

Hope it helps

Answer 2

I hope it Will help you..