Student Login

Home›Chapters›Ray Optics PYQs›Prism, Dispersion & Scattering›Question 73

JEE Main 2019 (11 Jan, Shift 2) · Prism, Dispersion & Scattering

Prism, Dispersion & Scattering question from JEE Main 2019 (11 Jan, Shift 2)

Q73JEE Main 2019 · 11 JAN · SHIFT 2Medium

Prism, Dispersion & Scattering

A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the refractive index of the material of the prism is $\sqrt{3}$ , then the angle of incidence is:

Show answer and solution

Answer: (a)

At minimum deviation $r_1 = r_2 = \frac{A}{2} = 30^\circ$ for an equilateral prism.
Snell's law: $\sin i = \mu \sin r = \sqrt{3}\times\frac{1}{2} = \frac{\sqrt{3}}{2}$
So the answer is (a) $i = 60^\circ$ .

Report a mistake

More questions on Prism, Dispersion & Scattering

The variation of refractive index of a crown glass thin prism with wavelength of the…JEE Main 2019 (11 Jan, Shift 1)
A ray of light is incident at an angle of 60° on one face of a prism of angle 30°. The…JEE Main 2018 (16 Apr, Shift 1)
The refractive index of the material of a prism is √(2) and the angle of the prism is…NEET 2018
A thin prism having refracting angle 10° is made of glass of refractive infex 1.42. This…NEET 2017
The angle of incidence for a ray of light at a refracting surface of a prism is 45°. The…NEET 2016 (Phase 1)
In an experiment for determination of refractive index of glass of a prism by i - δ plot…JEE Main 2016
The refracting angle of a prism is A, and refractive index of the material of the prism…NEET 2015 (AIPMT, Cancelled Paper)
Monochromatic light is incident on a glass prism of angle A. If the refractive index of…JEE Main 2015