What is Plano-convex lens ?

The radius of curvature of the convex surface of a thin plano-convex lens is 12 cm, and the refractive index of its material is 1.6. What is the power of lens ?

The radius of curvature of the convex surface of a thin plano-convex lens is 12 cm, and the refractive index of its material is 1.6. What is the power of lens ?

The apparent thickness of a thick plano-convex lens is measured once with the plane face upward and then with the convex face upward. The value will be

The apparent thickness of a thick plano-convex lens is measured once with the plane face upward and then with the convex face upward. The value will be

The radius of curvature of the convex surface of a thin plano-convex lens is 15 cm and the refractive index of its material is 1.6. The power of the lens is

The radius of curvature of curved surface of a thin plano-convex lens is 10 cm and the refractive index is 1.5 . If the plano surface is silvered, then the focal length will be.

The radius of curvature of curved surface of a thin plano-convex lens is 10 cm and the refractive index is 1.5 . If the plano surface is silvered, then the focal length will be.

The adjacent figure shows a thin plano-convex lens of refractive index mu_1 and a thin plano-concave lens of refractive index mu_2 , both having same radius of curvature R of their curved surfaces. The thin lens of refractive index mu_3 has radius of curvature R of both its surfaces. This lens is so placed in between the plano-convex and plano-concave lenses that the plane surfaces are parallel to each other. The focal length of the combination is

The adjacent figure shows a thin plano-convex lens of refractive index mu_1 and a thin plano-concave lens of refractive index mu_2 , both having same radius of curvature R of their curved surfaces. The thin lens of refractive index mu_3 has radius of curvature R of both its surfaces. This lens is so placed in between the plano-convex and plano-concave lenses that the plane surfaces are parallel to each other. The focal length of the combination is