Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) A ray of light passes through media with refractive indices `mu_1, mu_2, mu_3` and `mu_4 `as shown in the figure. The surface of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, we must have - Sarthaks eConnect

A ray of light passes through media with refractive indices `mu_1, mu_2, mu_3` and `mu_4 `as shown in the figure. The surface of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, we must have

A ray of light passes through media with refractive indices `mu_1, mu_2, mu_3` and `mu_4 `as shown in the figure. The surface of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, we must have

A.

`mu_1=mu_2`

B.

`mu_2=mu_3`

C.

`mu_3=mu_4`

D.

`mu_4=mu_1`