An optical fiber is a material whose refractive index is greater than that of the surrounding medium, which allows the transmission of optical signals. If the fiber material is glass (n = 1.4) and it is surrounded by air, determine the critical angle for that interface. Consider that the refractive index of air is unit. a) 45.58° b) 0.6926° c) 0° d) arc sen (1.4)

An optical fiber is a material whose refractive index is greater than that of the surrounding medium, which allows the transmission of optical signals. If the fiber material is glass (n = 1.4) and it is surrounded by air, determine the critical angle for that interface. Consider that the refractive index of air is unit. a) 45.58° b) 0.6926° c) 0° d) arc sen (1.4)