For a material medium, the values of refractive index for violet and red colours are given as nv= text1.56 and nr= text1.44 . The dispersive power of a prism made out of this material is

Question

For a material medium, the values of refractive index for violet and red colours are given as nv= text1.56 and nr= text1.44 . The dispersive power of a prism made out of this material is (A) 0.06 (B) 0.24 (C) 0.03 (D) none of these

Tardigrade Admin · Accepted Answer

Dispersive power of a prism is given as, ω =(nv - nr/(. (nv + nr)2 .) - 1)=( text1.56 - text1.44/(. ( text1.56 + text1.44)2 .) - 1)= text0.24

Q. For a material medium, the values of refractive index for violet and red colours are given as $n_{v} = 1.56$ and $n_{r} = 1.44$ . The dispersive power of a prism made out of this material is

$0.06$

$0.24$

$0.03$

none of these

Dispersive power of a prism is given as,
$ω = \frac{n _{v} - n _{r}}{( \frac{n _{v} + n _{r}}{2} ) - 1} = \frac{1.56 - 1.44}{( \frac{1.56 + 1.44}{2} ) - 1} = 0.24$

Q. For a material medium, the values of refractive index for violet and red colours are given as nv​=1.56 and nr​=1.44 . The dispersive power of a prism made out of this material is

0.06

0.24

0.03