Question

help me fast....it's of 10std​

Answer 1

Explanation:

R.I of water = Speed of light in vacuum / speed of light in water

$3</p><p>4</p><p> </p><p> = </p><p>x</p><p>3×10 </p><p>8 </p><p> </p><p> </p><p> </p><p>x=2.25×10 </p><p>8</p><p> m/s$