If the refractive indices of crown glass...

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.

0.034 and 0.064

0.064 and 0.034

1.00 and 0.064

0.034 and 1.0

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