CUET Preparation Today
Find the dispersion produced by a thin prism of 18° having refractive index for red light = 1.56 and for violet light = 1.68. |
4.16° 6.16° 2.16° 8.16° |
2.16° |
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°. $θ = (1.68 − 1.56) × 18° = 2.16°$ |
