Question

A convex lens, glass slab, a glass prism, and a spherical solid ball have been prepared from the same optically transparent material. Dispersive power will be possessed only by

• A. the glass slab and prism only
• B. lens and solid ball only
• C. the prism only
• D. lens, slab, prism and solid ball

Answer 1

The correct option is D lens, slab, prism and solid ball

Convex lens, glass slab, glass prism and spherical solid ball all have dispersive power because in all four material we can find ${\mu }_v,{\mu }_R$ and ${\mu }_{\gamma }$ such that
$\frac{{\mu }_v-{\mu }_R}{{\mu }_{\gamma }-1}$ is dispersive power.

Hence, correct option is D.