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..
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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
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