Question

The angular deviation (dispersion) produced by a prism

• A. Increases if the average refractive index increases
• B. Increases if the average refractive index decreases
• C. Remains constant whether the average refractive index increases or decreases
• D. Has no relation with the refractive index

Answer 1

The correct option is A Increases if the average refractive index increases

It depends only on the refractive index of the prism and is independent of the shape and size of the prism.

it is given by,

$\delta =(\mu -1)\times A$