Question

the speed of light in water is 2.25*10^8 m/s ,find the refractive index of water

Answer 1

BTW, You should post in science section. But however here's the answer.

refractive index = speed of light in vaccum/speed of light in medium

ATQ,

n = 3×10^8 / 2.25 × 10^8
n =1.33, ans.

Answer 2

Answer:

1.33

Step-by-step explanation:

$\text{Refractive index of water }= \frac{\text{Speed of light in vacuum}}{\text{Speed of light in water}}$

We are given that the speed of light in water is $2.25 \times 10^8$

Speed of light in vacuum is  $3 \times 10^8$

So, $\text{Refractive index of water }= \frac{3 \times 10^8}{2.25 \times 10^8}$

$\text{Refractive index of water }= 1.33$

Hence the refractive index of water is 1.33