A prism ABC with (BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in the figure. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky.

Two identical prisms $ABC$ and $A\text{'}B\text{'}C\text{'}$ are given. White light is passed through $ABC$ as shown below: Which of the following positions of $\mathrm{A}\text{'}\mathrm{B}\text{'}\mathrm{C}’$ will again yield white light:

While performing the experiment to trace the path of a ray of light passing through glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below:

The correct path of the rays has been shown by: