Description
View through the RGB filter (Diffraction grating) of the projector on the incandescent light bulb. The light is divided into three basic colors, which we see as rainbow rays. In optics, a diffraction grating is an optical component with a periodic structure that splits and diffracts light into several beams travelling in different directions so that the grating acts as the dispersive element. More on https://en.wikipedia.org/wiki/Diffraction_grating