Photography
A camera is, in its simplest form, a box with a hole in its front. There is a special piece of glass in front of the hole called a lens. To take a photograph, the lens makes a small picture of the object inside the camera, which it does by focusing light. A lens in a camera works like a lens in glasses (spectacles) or a magnifying glass. One type of camera called the Pinhole camera has no lens but uses a very small hole to focus light.