First slide

Dispersion

Question

White light is passed through a prism whose angle is 5°. If the refractive indices for rays of red and blue colour are respectively 1.64 and 1.66, the angle of deviation between the two colours will be

Moderate

A

0.1 degree
B

0.2 degree
C

0.3 degree
D

0.4 degree

Solution

$θ = (μ_{v} - μ_{r}) A = 0 .02 \times 5^{\circ} = 0 {.1}^{\circ}$

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