The phenomenon we are seeing is called additive and subtractive color mixing. When blue, green, and red light combine, they create white light due to additive mixing. However, when you use a slit to block parts of this combined white light, you’re engaging in subtractive color mixing. The slit essentially acts as a filter, allowing only certain wavelengths of light to pass through. Shadows cast by objects result from the selective absorption of certain wavelengths of light, producing three disti

RGB Additive Color Mixing Demo: three LEDs projected onto a translucent screen demonstrate the additive nature of our perception of colored light. Three potentiometers allows the user to adjust the intensity of each color. Mixing Red, Green, and Blue to create Yellow, Magenta, and Cyan with the following mixings: R G=Y, G B=C, and R B=M. Adding all three R G B produces White. RGB color addition is the basis for all computer and TV displays- all the colors you are looking at right now on your scr