Question

the speed of light is maximum in water : true or false​

Answer 1

Answer:

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The speed of light is maximum in $\red{Vacuum}$ and is equal to 3 x 10^8 m/s.

Hope this helps you.

Answer 2

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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 of 1.3; see Figure 2) and 200,000 kilometers per second in glass (refractive index of 1.5).