Optics: a triangular prism (a transparent optical element with flat, polished surfaces that refract light) is breaking light up into its constituent spectral colors (the colors of the rainbow).
Triangular Prism Breaks Light Into Spectral Colors
Optics: a triangular prism (a transparent optical element with flat, polished surfaces that refract light) is breaking light up into its constituent spectral colors (the colors of the rainbow).