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What will be the speed of light in water...

What will be the speed of light in water if it is given that the refractive index of water is 4/3 and the speed of light in air is ` 3 xx 10^(8)` m/s?

Text Solution

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`._2n_(1) = v_(1)/u_(2) therefore v_(1) = v_(1)/(._(2)n_(1))`
` v_(2) = ( 3xx 10^(8) m//s)/(4//3) = ( 9 xx 10^(8)` m/s
The speed of light in water = `2.25 xx 10^(8)` m/s .
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