The refractive indices of a material for red, violet and yellow lights are $1.52, 1.62$ and $1.59$ respectively. Calculate the dispersive power of the material. If the mean deviation is $40°$, then will be the angular dispersion produced by a prism of this material?

A parallel beam of light is incident from air at an angle $\alpha$ on the side $PQ$ of a right-angled triangular prism of refractive index $n=\sqrt{2}$. Light undergoes total internal reflection at the prism at the face $PR$ when $\alpha$ has a minimum value of $45°$. The angle $\theta$ of the prism is:

Monochromatic light is incident on a glass prism of angle $A$. If the refractive index of the material of the prism is $n$, a ray incident at an angle $\theta$, on the face $AB$ would get transmitted through the face $AC$ of the prism provided.

A beam of light consisting of red, green and blue colours is incident on a right-angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths are $1.39, 1.44$ and $1.47$, respectively. The prism will: