Optical Glass X-Cube Dichroic Cube Prism RGB Combiner Splitter Teaching Tool 12.7*12.7MM It can be used as both a teaching tool and for research and decoration, making it very beautiful. -Optical glass RGB prisms feature four light-emitting surfaces. White light falls on any one luminous surface and emits three primary colors, namely red, green, and blue, from the remaining three light-emitting surfaces, known as trichromatic light. -This is very light. That is, the three types of light from red, green, and blue are fundamental light, and that from the remaining surface emits white light, which is light. -This is one of the most important accessories on a projector. The projector can cast shadows of colors on the screen. You should know which color of light is composed of the three primary colors on the screen, and prisms with important colors are composed of the three primary colors.