A projector lens are used to accurately collimate the light for projectors.It has a large aperture and a short focal length.There are many types of projector... more

A lens is made up of glass, plastic or some other transparent materials and is curved in shape. When light ray pass through a lens, the light ray change... more

Refraction is the bending of light as it passes from one medium to another. This bending is caused by the change is the speed of light in different media.... more

A camera is a device that can capture still and motion images. The first camera ever developed was known as the ‘Camera Obscura’. Today many modern... more