N c v The index of refraction of some common materials are given below. Speed of light in the 2nd Medium- v₂. B Refractive index of water with respect to air 43 Refractive index of glass with respect to air 32 2 10 8 ms 1 i.
The symbol n denotes the refractive index.
Place the point light source a known distance from the surface of the object. The lower the refractive index the faster the velocity of light. The refraction of light is due to the change of speed when light passes from one medium to another. Speed of light in the 2nd Medium- v₂.