A light ray travels through three medias as shown. Which of the following shows the ascending order of their refractive indices?

1. $n_2,n_3,n_1$
2. $n_1,n_2,n_3$
3. $n_1,n_3,n_2$
4. $n_3,n_1,n_2$

Q. A rays of light passes through four transparent media with refractive indices ${\mu }_1,{\mu }_2,{\mu }_{3}and{\mu }_4$ as shown in the Figure 28.79. The surface of all media are parallel. if the ray CD is parallel to the incident ray AB. We must have

Q. A light ray is passing through three different media shown below. Which of the following options are correct regarding the refractive indices of these media?​

Q. A light ray is passing through the three given media. Which of the following options are correct regarding the refractive indices of these media?

Q. In the figure below, PQRS denotes the path followed by a ray of light as it travels through three media in succession. The absolute 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

Q. In the figure below, PQRS denotes the path followed by a ray of light as it travels three media in succession. The absolute 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 :