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If the refractive indices of a prism for...

If the refractive indices of a prism for red, yellow and violet colours be `1.61, 1.63` and `1.65` respectively, then the dispersive power of the prism will be

A

`(1.65 - 1.62)/(1.61 -1 )`

B

`(1.62 - 1.61)/(1.65 -1)`

C

`(1.65 -1.61)/(1.63-1)`

D

`(1.65 -1.63)/(1.61-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Dispersive power `(omega) = (n_(v) - n_(r ))/(n_(y) - 1) = (1.65 - 1.61)/(1.63 - 1)` .
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