Question

if the refractive indices of prism for red, yellow, and violet colour be 1.61, 1.63, 1.65 respectively then the dispersion power of the prism will be?

Answer 1

Dispersion power is equal to

(Refractive index by violet light-refractive index by red light)/refractive index by yellow light-1

1.65-1.61/1.63-1=0.0635

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