Optic axis of a thin equi-convex lens is the x-axis. The co-ordinates of a point object and its image are `(-40 cm,1 cm) and (50 cm,-2 cm),` respectively. Lens is located at

Optic axis of a thin equiconvex lens is the x-axis. The co-rodinates of a point object and its image axis (-40 cm, 1 cm) and (50 cm, -2 cm) respectively. Lens is located at

Optic axis of a thin equiconvex lens is the x-axis. The co-rodinates of a point object and its image axis (-40 cm, 1 cm) and (50 cm, -2 cm) respectively. Lens is located at

Optic axis of a thin equiconvex lens is the x-axis. The co-rodinates of a point object and its image axis (-40 cm, 1 cm) and (50 cm, -2 cm) respectively. Lens is located at

The principal axis of a thin equi-convex lens is the x-axis. The co-ordinate of a point object and its image are (– 20 cm, 1 mm) and (25 cm, 2 mm) respectively. Find the focal length of the lens.

A point object is located at a distance of 15 cm, from the front surface of a thick bi-convex lens. The lens is 10 cm thick and radii of its front and back surfaces are 10 cm and 25 cm respectively. How fae beyond the back surface of this lens (mu=1.5) is the image formed?

For a given optical system, the principal axis is x-axis and coordinates of object are (-30,+1,0) and coordinates of image are (+20,-2,0) All coordinates are in cm. If the optical system is a convex lens, what is its focal length?

A convex mirror and convex lens of radius of curvature 20 cm are placed on same axis with 30 cm separation. A point-like object is placed at 20 cm from convex lens and its image by this combination is obtained at object. What will be focal length of convex lens ?

Distance of an object from the first focus of an equi-convex lens is 10 cm and the distance of its real image from second focus is 40 cm. The focal length of the lens is