For a medium, refractive indices for violet, red and yellow are known to be 1.62 , 1.52 and 1.55 respectively. What will be the dispersive power of the medium ?

Question

For a medium, refractive indices for violet, red and yellow are known to be 1.62 , 1.52 and 1.55 respectively. What will be the dispersive power of the medium ? (A) 0.65 (B) 0.22 (C) 0.18 (D) 0.02

Tardigrade Admin · Accepted Answer

The Dispersive power ω of a medium is given by: ω =(μ v - μ r/μ y - 1)Substituting:ω =(1 . 62 - 1 . 52/1 . 57 - 1)=(. 1/. 57)=0.18

Q. For a medium, refractive indices for violet, red and yellow are known to be $1.62$ , $1.52$ and $1.55$ respectively. What will be the dispersive power of the medium ?

$0.65$

$0.22$

$0.18$

$0.02$

The Dispersive power $ω$ of a medium is given by :
$ω = \frac{μ _{v} - μ _{r}}{μ _{y} - 1} S u b s t i t u t in g : ω = \frac{1.62 - 1.52}{1.57 - 1} = \frac{.1}{.57} = 0.18$

Q. For a medium, refractive indices for violet, red and yellow are known to be 1.62 , 1.52 and 1.55 respectively. What will be the dispersive power of the medium ?

0.65

0.22

0.18

0.02

The Dispersive power ω of a medium is given by : ω=μy​−1μv​−μr​​Substituting:ω=1.57−11.62−1.52​=.57.1​=0.18

Q. For a medium, refractive indices for violet, red and yellow are known to be $1.62$ , $1.52$ and $1.55$ respectively. What will be the dispersive power of the medium ?

$0.65$

$0.22$

$0.18$

$0.02$

The Dispersive power $ω$ of a medium is given by :
$ω = \frac{μ _{v} - μ _{r}}{μ _{y} - 1} S u b s t i t u t in g : ω = \frac{1.62 - 1.52}{1.57 - 1} = \frac{.1}{.57} = 0.18$