Question

the velocity of light is 3x10 to the power 8 m/s find the velocity of light in water if refractive index of water is 2

Answer 1

correct answer is 16 m/s

Answer 2

Refractive index = speed of light in air/speed of light in that medium

2 = 3×10^8 / X

X = 3×10^8 / 2

X = 1.50×10^8 m/sec

so,the speed of light in water will be

1.50×10^8 m/sec