Specifications: This model is used for the study the characteristics of Fiber Optic Apparatus, by utilizing the theory of ?Total Internal Reflection? This model proves the theory that if light travels from a medium which has more value of ?Index of Refraction? to a medium which has less value of ?Index of Refraction?, given that the ?Angle of incidence? of the medium is equal to or more than the ?Critical Angle?, the light will not travel through, but will instead be reflected to the first medium. The pavilion-shaped based in built on a circular base with diameters of 45cm. and is 10cm. thick, which is used for placing this apparatus. 220VAC 50Hz.