Question

refractive index of a medium is 0.75. what is your opinion about the medium? plzz ans me.. ​

Answer 1

Answer:

Let velocity of light in air be v.

Velocity of light in medium, v

m

=

n

v

where n is the refractive index of the medium.

∴ 0.75v=

n

v

⟹n=

3

4

Given : n

1

=1

Using Snell's law of refraction: 1×sini=n×sinr...............(1)

But it is given that angle of incidence is very small, i.e sini≈i

Hence angle of refraction is also very small ⟹sinr≈r

∴ From equation (1), i=

3

4

r

Now angle of deviation, δ=i−r=i−

4

3

i ⟹δ=

4

i

Answer 2

Answer:

very rare medium .......