Question

The refractive index of water is 1.33. What will be speed of light in water?(a) 3 × 10⁸ m/s(b) 2.25 × 10⁸ m/s(c) 4 × 10⁸ m/s(d) 1.33 × 10⁸ m/s

Answer 1

Refractive index = Speed of light in vaccum / Speed of light in water.

= 3 × 10^8 m/s / 1.33

= 2.25 × 10^8 m/s.

$<marquee>$b. 2.25 × 10^8

Answer 2

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Refractive index = Speed of light in vaccum / Speed of light in water.

= 3 × 10^8 m/s / 1.33

= 2.25 × 10^8 m/s.

 b. 2.25 × 10^8

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