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The refractive angles of two crown glas...

The refractive angles of two crown glass prisms are `10^(@)` and `20^(@)` respectively . What is the ratio of their dispersive the material of the same prism then

A

`1 : 2`

B

`2 : 1`

C

`1: 1`

D

`1 : 4`

Text Solution

Verified by Experts

The correct Answer is:
C
The dispersive power of a prism depends upon the material of the prism and not on the refracting angle of the prism . As both prisms are made from crown glass , they have the same dispersive powers . Hence the ratio of their dispersive powers is `1 : 1`.
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