Question

speed of light in vacuum is 3 into 10 ki power 8 metre per second calculate the speed of light in water if refractive index is of water is 4 upon 3

Answer 1

Speed of light in water= 2.25 ×10^8 m/s.

Answer 2

Given :

Speed of light in vacuum is , $v_1=3\times 10^8 \ m/s$ .

To Find :

The speed of light in water if refractive index is of water is 4/3 .

Solution :

We know , velocity in light is inversely proportional to the refractive index :

So ,

$\dfrac{v_2}{v_1}=\dfrac{r_1}{r_2}\\\\\dfrac{v_2}{3\times 10^8}=\dfrac{1}{\dfrac{4}{3}}\\\\v_2=\dfrac{3\times 3 \times 10^8}{4}\\\\v_2=2.25\times 10^8\ m/s$

Hence , this is the required solution .

Learn More :

Speed of light

https://brainly.in/question/1827108