Question

a light Ray travels in the speed of 2×10to the power 8.and it travels through another source which is connected to the 1st one in the speed of 2.5×10to the power 8.wjats the critical angles of that light Ray? ​

Answer 1

The Critical angle for the medium is given by:

⇒sin

−1

μ

1

The refractive index of the medium A with respect to medium B is given by:

A

μ

B

=

v

1

v

2

μ=

18

24

=

3

4

Now the critical angle is obtained as:

=sin

−1