Answer :

Speed of light is maximum in Water.

The refractive indices of any medium are inversely proportional to the speed of light in it. We can see from the formula of refractive indices:



Speed glass = =


Similarly, for,


Speed glycerine =


Speed sunflower oil =


Speed water =


Speed Flint glass =


Here we see that,


Speed water > Speed glycerine > Speed glass > Speed Flint glass > Speed sunflower oil


We can also say that greater the refractive indices lesser will be speed.


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