Question

The speed of light in a medium is 2.5 × 10(8) m/s. What is its refractive index if the speed of light in air is 3 × 10(8) m/s? *
1) 1.2
2) 0.74
3) 1.36
4) 1.77

Answer 1

Step-by-step explanation:

It is to be noted that

μ=

speedoflightinmedium

speedoflightinvaccum

Hence, μ

1

=

2.5/10

8

3/10

8

and μ

2

=

2/10

8

3/10

8

Now , Refractive index of medium (1) w.r.t. medium (2)

μ

2

=

μ

2

μ

1

=

2.5/10

8

3/10

8

/

3/10

8

2/10

8

μ

2

=

5

4