The television camera is rather like the human eye. Both the eye and the camera have a lens, and both produce a picture on a screen. In each case the picture is made up of millions of spots of light. Let us see how the eye works. When we look at an object-a person, a house, or whatever it may be, we do not see all the details of the object in one piece. We imagine that we do, but this is not the case. In fact, the eye builds up the picture for us in our brain, which controls our sight, in millions of separate parts, and although we do not realize it, all these details are seen separately. This is what happens when we look at something. Beams of light of different degrees of intensity, re-fleeted from all parts of the object, strike the lens of the eye. The lens then gathers together the spots of light from these beams and focuses them on to a light-sensitive plate-the retina-at the back of the eyeball. In this w A. beams of light-lens of the television camera-an electronic device-electric impulses-aerials-receivers-pictures B. beams of light-lens of the television camera-a plate-an electronic device-electric impulses-receivers-aerials-pictures C. beams of light-a plate-an electronic device-aerials-electric impulses-receivers-pictures D. beams of light-lens of the television camera-a plate-an electronic device-electric impulses-aerials-receivers-pictures
