To do this, you will make a color wheel and attach it to a cordless drill. In this science fair project, you will add colored light together to determine what new colors can be formed. As more colors of paint are mixed in, more colors are subtracted, and the mixture becomes darker, eventually becoming black. For example, red paint absorbs (subtracts) green light, and the green paint absorbs (subtracts) red light, so when you mix the red and green paint, the mixture becomes a muted drab color, close to brown. Color subtraction is the process of absorbing certain colors. Why? This is because paint colors combine by color subtraction.
If you mix red and green paint, however, the mixture is closer to brown than it is to yellow. The new color is made by adding colors of light together. Color addition involves combining different colors of light to form a new color of light. If you mix all three colors of light-red, green, and blue-on a single spot on a screen, they form white light! This is called color addition. For example, red and green light mix to make yellow light. When two primary colors of light are mixed together, a secondary color is created. Have you ever wondered from where all the beautiful colors that you see around you come? How are they made? It all starts with the three primary colors of light, which are red, green, and blue.
