Question

The refractive index of water is 1.33. The speed of light in water will be
1-1.33 * 108 m/s
2. 3* 108 m/s
3-2.26 x 108 m/s
4- 2.66 * 108 m/s​

Answer 1

Answer:

225,000 kilometers per second

Answer 2

Answer:

The refractive index of water is 1.33. The speed of light in water will be $v=2.2*10^{8}m/s$

Explanation:

when a light ray travels from one medium to another medium its direction changes because the velocity of light is different in a different medium

The refractive index is the degree of the change in direction of light as mentioned above. It is given by the formula $n=C/v$

where $C=3*10^{8}m/s$ (velocity of light in vacuum)

and $v$ the velocity of light in a given medium

from the question, it is given that

the refractive index of the water is $n=1.33$

the speed of light in water is $v=C/n=3*10^{8}/1.33=2.2*10^{8}m/s$