The Cauchy's dispersion formula is:

Two incident monochromatic waves whose wavelengths differ by a small amount $d\lambda$ are separated angularly at $\theta$ and $\theta + d\theta$ with respect to the incident ray. The dispersive power is given by

Explain the dispersion of white light.

The prism angle of a prism is $10^{\circ}$. The refractive indices for red and violet colors are $1.51$ and $1.52$ respectively. The dispersive power will be .....

The refractive index of a particular material is $1.67$ for blue light,$1.65$ for yellow light,and $1.63$ for red light. The dispersive power of the material is .........

Which of the following quantities related to a lens depend on the wavelength of the incident light?