A lens shown in the figure VSAQ 9.73 is made of two different materials. A point object is placed on its axis. How many images will it form?

Where should an object be placed so that its real and same size image is formed?

A concave mirror s placed on a horizontal table with its axis directed vertically upwards.Let O be the pole of the mirror canc C its centre of curvature.A point object is placed at C.It has a real image ,also located at C.If the mirror is now filled with water ,the image will be:

The radius of curvture of the convex face of a plano-covex lens is 12 cm and its refractive index is 1.5. Calculate the image distance,when a point object is paced on the axis 20 cm from the lens.

A point charge Q is placed at point O as shown in the figure. is the potential difference V_A - V_B positive, negative or zero if Q is postive or negative?

A plano convex lens of refractive index 1.5 and radius of curvature 30cm. Is silvered at the curved surface. Now this lens has been used to form the image of an object. At what distance from this lens an object be placed in order to have a real image of size of the object.

A concave lens has focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? Also find the magnification produced by the lens.

An unsymmetrical double convex thin lens forms the image of a point object on its axis. Will the position of the image change if the lens is reversed?

A real image of a distant object is formed by a plano-convex lens on its principal axis .Spherical abbretion