Newton's disc - colors adding
Decomposition of light by a prism described in detail in his book Optica Isaac Newton, which was published in 1686. At the same time, however, showed that each monochromatic light can also take back the white light. It can be proved using the so-called Newton's wheel.
Educational phase: motivation, exposition
Clamp the blade in drills, engine, or just hold in your hand.
Observe the motion and color mixing.
The surface of the disc is divided into six slices, which are colored color spectrum. If illuminated by daylight disc spinning at more than 100 revolutions per second, all the colors blend and surface of the disc is gray.
Attempt to prove that the color of light sources of different color or illuminated objects is the result of the general perception monofrekvenčních lights of different colors. It either emits a light source, or are contained in light reflected from a surface. The resulting color sensation is then referred to the corresponding color name, we describe the tone color.
Application in practice
The principle of additive color mixing is applied such as computer monitors and TV screens = RGB model.