Refraction is the change in direction of light when it passes from one medium to another. The working of a lens is based on the refraction of light when they pass through it. Lens is a transparent ...

A plano-convex cylindrical lens is used to condense light in one axis. A positive plano cylindrical lens is able to create a line image from a point of light, to change the aspect ratio of an image or ...

Here’s a lot of tough questions you could expect in the Class 12 physics paper. a) The question arises on how to place an object behind the mirror as the centre of curvature of a convex mirror is ...