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Find the dispersive power of flint glass...

Find the dispersive power of flint glass. The refractive indices of flint glass for red, yellow and violet light are 1.613, 1.620 and 1.632 respectively.

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1.658
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The refractive indicates of flint glass for red and violent colours are 1.644 "and" 1.664 . Calculate its dispersive power.

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What is the angle of dispersion between red and violet colours produced by a flint glass prism of refracting angle 60^(@) ? Refractive indices of the given prism for red and violet colours are 1.622 and 1.663, respectively.

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If the refractive indices of crown glass for red, yellow and violet colours are 1.5140, 1.5170 and 1.5318 respectively and for flint glass these are 1.6434, 1.6499 and 1.6852 respectively, then the dispersive powers for crown and flint glass are respectively.

ir the refractive indices of crown glass for red yellow and violet colours are 1.5140, 1.570 and 1.5318 respectivelyand ofr flint glass these values are 1.6434, 1.6852 respectively , then the dispersive powers for crown and flint glass are respectively