Question

Example - 39 Refractive index of glass for red and violet colours are 1.50 and 1.60 respectively. Find
(a) the refractive index for yellow colour, approximately
(b) Dispersive power of the medium..​

Answer 1

Answer:

22

Explanation:

n. red=.5 n. violet=1.6

n. yellow=average of red and violet

=(.5+1.6)/2 =1.05

dispersive power=(n.violet-n.red)/(n.yellow-1)

=(1.6-.5) /(1.05-1)

= 1.1/.05