1. Refractive indices of medium A, B and C are 1.3, 1.5 and 1.4 respectively.
In which of the following the speed of light will be the :
(a) fastest
(b) slowest and why?
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Answer. Refractive index of a medium is inversely proportional to the speed or velocity of light,i.e. higher the refractive index of a medium, lower will be the speed of light in that medium and vice-versa.
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