REFRACTIVE INDEX

Asked by ravikiran | 9th Aug, 2009, 12:06: PM

Expert Answer:

When light travels from one medium (air) into another (glass, water), it's speed is reduced.

Refractive index of the second medium (glass, water) with respect to first (air) 

                                           = Light Speed in first medium (air) / Light speed in second medium (glass, water).

Mirage is due to the variation of refractive index of air (hot, cold) from ground up i.e. with respect to height from ground.

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Answered by  | 9th Aug, 2009, 01:45: PM

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