What curvature must be given to the bounding surface of `mu = 1.5` for virtual image of an object in the medium of `mu = 1 at 10 cm` to be formed at a distance of `40 cm`. Calculate power of the refracting surface and also two principal focal lengths of the surface.

What curvature must be given to the bounding surface of a refracting medium (mu=1.5) for the virtual image of an object in the adjacent medium (mu=1) at 10 cm to be formed at a distance of 40 cm?

What curvature must be given to the bounding concave surface of refracting medium (mu = 3//2) for a virtual image at 40 cm of an object in this medium at a distance of 60 cm . The adjoining medium is air (mu = 1) .

A curved surface of mu= 1.5 forms a virtual image of an object which is placed in air at a distance of 15 cm from the surface. The image is formed at a distance of 60 cm, what is the radius of curvature of the curved surface? Also, calculate the power of curved surface and the two focal lengths of the surface.

A point object is situated in air at a distance of 20 cm from a convex refracting surface of 5cm radius. The position of the image is [ mu=1.5]

A plano-convex lens P and a concavo-convex lens Q are in contact as shown in figure. The refractive index o fthe material of the lens P and Q is 1.8 and 1.2 respectively. The radius of curvature of the concave surface of the lens Q is double the radius of curvature of the convex surface. The convex surface of Q is silvered. An object is placed on the placed on the principal axis at a distance 10 cm form the plane surface. The image is formed at a distance 40 cm from the plane surfaces on the same side. The focal length of the system is

A plano-convex lens P and a concavo-convex lens Q are in contact as shown in figure. The refractive index o fthe material of the lens P and Q is 1.8 and 1.2 respectively. The radius of curvature of the concave surface of the lens Q is double the radius of curvature of the convex surface. The convex surface of Q is silvered. An object is placed on the placed on the principal axis at a distance 10 cm form the plane surface. The image is formed at a distance 40 cm from the plane surfaces on the same side. The focal length of the system is

A point object is situated in air at a distance of 20 cm from a convex refracting surface of 5cm radius. The position of the iamge is [ mu=1.5]

If the radii of curvature of the two surfaces of a concave lens are 10 cm and 20 cm respectively and the refractive index is 1.5. What is its focal length ?

The radius of curvature of each surface of a convex lens of refractive index 1.5 is 40 cm. Calculate its power.