Answer: When one-half of a convex lens is covered with black paper, the lens will still produce a complete image of the object, but the quality of the image may be affected.

A plano-convex lens is compose of a plane and convex surfaces, has a positive focal length.It is used for the changing between point light source and parallel beam.It is mean when the light through ...

Q.10.. A student conducts an experiment using a convex lens of focal length 20 cm and an object of height 15 cm. He placed the object at 25 cm from the lens. Can the image be formed on a screen?