Question

The angular dispersion produced by a prism ___________ .

Options

• increases if the average refractive index increases

• increases if the average refractive index decreases

• remains constant whether the average refractive index increases or decreases

• has no relation with average refractive index

Answer 1

increases if the average refractive index increases

 

If μ is the average refractive index and A is the angle of prism, then the angular dispersion produced by the prism is given by \[\delta = (\mu - 1)A\]