If the figure below, `PQRS` denotes the path followed by a ray of light as it travels three media
Channel: Doubtnut
Date: 2020-04-12

If the figure below, `PQRS` denotes the path followed by a ray of light as it travels three media in succession. The absoulte refractive indices of the media are `mu_(1),mu_(2)` and `mu_(3)` respectively (The line segment `RS'` in the figure is parallel to `PQ`) Then :   img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/RES_DPP_PHY_XII_E01_099_Q01.png" width="80%"