Ray Optics Test...

A convex lens of crown glass (n = 1.525) will behave asa divergent lens if immersed in

A divergent lens will produce

The minimum distance between an object and its real image formed by a convex lens is

An object is placed at a distance of 20 cm from a convex lens of focal length 10 cm. The image is formed on theother side of the lens at a distance

Two thin lenses, one of focal length + 60 cm and the other of focal length – 20 cm are put in contact. Thecombined focal length is

A double convex lens of focal length 20 cm is made of glass of refractive index 3/2. When placed completely in water (_aμ_w = 4/3), its focal length will be

A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves away from the lens on the other side of the principal axis, theintensity of light

A double convex thin lens made of glass (refractive index μ = 1.5) has both radii of curvature of magnitude 20 cm. Incident light rays parallel to the axis of the lens will converge at a distance L such that

A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of thematerial is

A biconvex lens forms a real image of an object placed perpendicular to its principal axis. Suppose the radii of curvature of the lens tend to infinity. Then, the image would