Find the dispersion produced by a thin p

CUET Preparation Today

Start Free Mocks

Home Questions AQM5PTNADR

Target Exam

CUET

Subject

Physics

Chapter

Ray Optics

Question:

Find the dispersion produced by a thin prism of 18° having refractive index for red light = 1.56 and for violet light = 1.68.

Options:

4.16°

6.16°

2.16°

8.16°

Correct Answer:

2.16°

Explanation:

We know that dispersion produced by a thin prism

$θ=(μ_v-μ_R)A$

Here $μ_v= 1.68, μ_R = 1.56$ and A = 18°.

$θ = (1.68 − 1.56) × 18° = 2.16°$