A point object is placed in air at a distance of 40 cm from a concave refracting surface of refractive index 1.5. If the radius of curvature of the surface is 20 cm, then the position of the image is –

A small point objects is placed in air at a distance of 60 cm from a convex spherical refractive surface of mu = 1.5 . If radius of curvature of spherical surface is 25 m , calculate the position of the image and the power of the refracting surface.

A small point object is placed at O at a distance of 0.60 metre in air from a convex spherical surface of refractive index 1.5 .If the radius of the curvature is 25cm then what is the position of the image on the principal axis.

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]

An object is placed at a distance of 20cm from a equi-concave lens of focal length 30cm , whose one surface is silvered. If the radius of curvature of the silvered surface is 60cm , find the position and nature of the image.

A point source of light is placed in air, 100 cm away from a convex spherical surface, made of material of refractive index 1.5 and having radius of curvature = 20 cm. If the source emits light, at what position from the convex surface image will be formed?

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.

The focal length of a convex lens is 10 cm and its refractive index is 1.5 . If the radius of curvature of one surface is 7.5 cm, the radius of curvature of the second surface will be :

The focal length of a convex lens is 10 cm and its refractive index is 1.5. If the radius of curvature of one surface is 7.5 cm , the radius of curvature of the second surface will be