User:Dana D

Primary And Secondary Colors Additive and Subtractive

major people: In 1666, Isaac Newton did his first scientific experiments on the colors produced when a narrow beam of sunlight passed through a prism. Newton called the ordered arrangement of colors from violet to red a spectrum. He thought that some unevenness in the glass might be producing the spectrum. To test this assumption, he allowed the spectrum from one prism to fall on a second prim. If the spectrum was caused by irregularities in the glass, then the second prism should have increased the spread of colors. Instead, the second prism reversed the spreading of colors and recombined them to form white light. After more experiments, Newton concluded that white light is composed of colors. We now know that each color in the spectrum is associated with a specific wavelength of light.

applications of topic: The additive color process consists of the combination of red, green and blue light to form white light. An example of a system that uses the additive process is a color television tube. The T.V has tiny dot light sources of red, green and blue light. When all have the correct intensities, the screen appears to be white. For this reason, red, green and blue light are called the primary colors of light. The primary colors can be mixed by pairs to form three different colors. Red and green light together produce yellow light, blue and green light produce orange and red and blue light produce magenta. The colors resulting from the combination of two primary colors are called secondary colors. Secondary colors of light include yellow, orange and magenta.