The refractive index of a glass is 1.5. This means that the velocity of light is 1.5 times slower in glass as compared to the velocity of light in air/vacuum.
Following are the laws of refraction of light:
Due to refraction, the apparent depth of water in a pond appears less than the real depth. Because of the phenomenon of refraction, light rays coming from the bottom of the pond bend when they reach the surface. As a result, it appears to be coming from a different position above the actual depth of the pond.
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