Answers

2016-03-06T08:07:09+05:30
 Speed of light in air/ speed of light in glass = 4/3
 Speed of light in air = 4/3 x 2 x 10^8 
                                 = 2.66 x 10^8
Speed of light in air / speed of light in water = 3/2
Speed of light in water = 2/3 x 2.66 x 10^8 
                                     = 1.77 x 10^8
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