Dispersion of Light

It is desired to make an achromatic combination of two lenses $(L_1 \& L_2)$ ${\omega }_1$ and ${\omega }_2 (<{\omega }_1)$. If the combination of lenses is converging then

A thin prism of angle $5°$ is placed at a distance of $10 \mathrm{cm}$ from the object. The distance of the image from the object is (given $\mathrm{\mu }$ of prism$=\text{1.5}$)

A prism has a refractive index $\sqrt{\frac{3}{2}}$ and refracting angle $90°$. Find the minimum deviation produced by prism

A ray incident at angle 53^o on a prism emerges at an angle at 37^o as shown. If the angle of incidence is made 50^o, which of the following is a possible value of the angle of emergence.

A parallel beam of light falls normaly on the first face of a prism of small angle. At the second face it is partly transmitted and partly reflected, the reflected beam striking at the first face again, and emerging from it in a direction making an angle 6^o 30' with the reversed direction of the incident beam. The refracted beam is found to have undergone a deviation of 1^o 15' from the original direction. Find the refractive index of the glass and the angle of the prism.

The refractive indices of the crown glass for violet and red lights are $1.51$ and $1.49$ respectively and those of the flint glass are $1.77$ and $1.73$ respectively. A prism of angle $6°$ is made of crown glass. A beam of white light is incident at a small angle on this prism. The other thin flint glass prism is combined with the crown glass prism such that net mean deviation is $1.5°$ anticlockwise.
A screen is placed normal to the emerging beam at a distance of $2 \mathrm{m}$ from the prism combination. Find the distance between red and violet spot on the screen. Which is the topmost colour on screen.

Which one of the following spherical lenses does not exhibit dispersion? The radii of curvature of the surfaces of the lenses are as given in the diagrams.

Which one of the following spherical lenses does not exhibit dispersion? The radii of curvature of the surfaces of the lenses are as given in the diagrams.

A given ray of light suffers minimum deviation in an equilateral prism $P$. Additional prism $Q$ and $R$ of identical shape and of the same material as $P$ are now added as shown in the figure. The ray will now suffer

A given ray of light suffers minimum deviation in an equilateral prism $P$. Additional prism $Q$ and $R$ of identical shape and of the same material as $P$ are now added as shown in the figure. The ray will now suffer

A ray of light is incident normally on one of the faces of a prism of apex angle $30°$and refractive index $\sqrt{2}$. The angle of deviation of the ray is

Refractive index of a transparent material is

Dispersive power of the material of a prism is $0.0221.$ If the deviation produced by it for yellow colour is $38°$, then the angular dispersion between red and violet colours is

A prism whose angular dispersion is ${30}^{\circ }$ Deviates light by ${60}^{°}$. The dispersive power of the prism is:

In producing a pure spectrum, the incident light is passed through a narrow slit placed in the focal plane of an achromatic lens because a narrow slit

What happens when the white light goes through a glass prism?

Dispersive power depends upon

If the refractive index of the material of a prism is $\mu$ and its angle of minimum deviation is $\pi /3$ then the angle of the prism is

The formation of primary rainbow is due to