Question

State the dependence of angle deviation:
(i) On the refractive index of the material of the prism.
(ii) On the wavelength of light.

Answer 1

(i) For a given angle of incidence, the prism with a higher refractive index (e.g. flight glass) produces a greater deviation than the prism which has lower refractive index (e.g, crown glass).
(ii) Angle of deviation decreases with the increases in the wavelength of light.
Angle of Deviation $\left(\delta \right)\propto \frac{1}{wavelength}$