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A glass prism A deviates the red and blu...

A glass prism A deviates the red and blue rays through `10^(@)` and `12^(@)` respectively . A second prism (B) deviates them through `8^(@)` and `10^(@)` respectively . What is the ratio of their dispersive powers ?

A

`11:9`

B

`9:11`

C

`3:2`

D

`1:1`

Text Solution

Verified by Experts

The correct Answer is:
B
`wprop 1/((d_(1)+d_(2))/2)`
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Knowledge Check

  • Compare the dispersive powers of two prisms if one of them deviates the blue and red rays through 10^(@) and 6^(@) respectively and the second prism through 8^(@) and 4.5^(@)

    A
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    B
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    A
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    B
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