Q. How does a color TV produce colors?

A. Look closely at a small portion of a color TV screen with a magnifying glass. You will see the three colors of red, blue and green rather the colors you see from a distance. The colors of images on a TV screen are formed only by these three colors in varying degrees of brightness. These colors are the three primary colors of light and all other colors can be made by combinations of these three. For example, if the three colors are mixed equally, white results. The color yellow is produced by mixing red and green, while purple is a mixture of red and blue. When there is no color displayed, black results. There are three corresponding kinds of cells in the human eyes, each of which recognizes one of the three primary colors of light. The human brain interprets various colors by judging the strength of each color in an integrated way. Similarly, a TV camera captures colors as the strength of each of the three primary colors and when a color TV reproduces that mixture, a full range of colors is seen in human eyes.