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 .........

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 ......... (A) 0.0615 (B) 0.024 (C) 0.031 (D) 1.60

Tardigrade Admin · Accepted Answer

ω=(μ v -μ r /μ y -1)=(1.67-1.63/1.65-1)=0.615

Q. 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 .........

0.0615

0.024

0.031

1.60

$ω = \frac{μ _{v} - μ _{r}}{μ _{y} - 1} = \frac{1.67 - 1.63}{1.65 - 1} = 0.615$

Q. 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 .........