[Solved] The speed of light will be minimum while passing through -

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Q.	The speed of light will be minimum while passing through -
A.	water
B.	vaccum
C.	air
D.	glass
Answer» D. glass
Explanation: T Light travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water (refractive index = 1.3; see Figure 1) and 200,000 kilometers per second in glass (refractive index of 1.5).

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