The refractive index of water is:(a) 1.33 (b) 1.50 (c) 2.42 (d) 1.36
(a) 1.33
Explanation
Velocity of light in water = $225,563,010\ m/s$
Velocity of light in air = $300,000,000\ m/s$
From the formula of refractive index, we know that-
$Refractive\ index\ of\ water=\frac {Velocity\ of\ light\ in\ air}{Velocity\ of\ light\ in\ water}$
$Refractive\ index\ of\ water=\frac {300,000,000\ m/s}{225,563,010\ m/s}$
$Refractive\ index\ of\ water=1.33$
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