First slide

Dispersion

Question

The refractive index of a particular material is 1.67 for blue light, 1.65 for yellow light and 1.63 for red light. The dispersive power of the material is

Moderate

A

0.0615
B

0.024
C

0.031
D

1.60

Solution

$ω = \frac{μ_{v} - μ_{r}}{μ_{γ} - 1} = \frac{1 .67 - 1 .63}{1 .65 - 1} = 0.0615$

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