Question

7. The velocity of light in a medium is 1.5 × 108 m/s. What is the refractive index of the medium with respect to

air, if the velocity in the air is 3 × 108m/s?​

Answer 1

Answer:

$\large\boxed{\sf{2}}$

Explanation:

Let the Velocity of light in a medium = v

Therefore, from the Question

$= > v = 1.5 \times {10}^{8} \: m {s}^{ - 1}$

Also, Let the velocity of light in air = c

Therefore, from the Question

$= > c = 3 \times {10}^{8} \: m {s}^{ - 1}$

Now, let the refractive index = n

We know that,

• n = c/v

Therefore, we will get

$= > n = \dfrac{3 \times {10}^{8} }{1.5 \times {10}^{8} } \\ \\ = > n = \dfrac{3}{1.5} \\ \\ = > n = 2$

Hence, refractive index of medium = 2

Answer 2

Answer:

The refractive index of the medium is 2.

Explanation:

Let the Velocity of light in a medium be M amd the Velocity of light in the air be A

Given, Velocity of light in medium = 1.5 × 108 m/s

And, Velocity of light in the air = 3 × 108 m/s

Therefore, refractive index = A / M

= 3 × 108 / 1.5 × 108

= 3 / 1.5 = 2 (answer).

PLEASE SELECT MY ANSWER AS THE BRAINLIEST ANSWER.