What is the speed of light in a medium whose refractive index is 2.42,if the speed of light in air is 3*10^8 ms^-1.
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Answer:1.23×10^8 m/s
Explanation:aug=2.42
3×10^8/g=2.42
g=3×10^8/2.42
g=1.23×10^8
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