The term 'light splitter' is a device that uses a PRISM to divide light into its component colors. A PRISM is a transparent optical element with flat, polished surfaces that refract light. When light passes through a PRISM, it is split into its component colors, which can then be used for various applications. The term 'light splitter' is often used to refer to a device that uses a PRISM to divide light into its component colors.