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The refractive indices of crown glass fo...

The refractive indices of crown glass for red , yellow and blue rays are `1.527 , 1.530` and 1.535 respectively . What is the dispersive power of crown glass for red and blue rays .

A

`0.012`

B

`0.015`

C

`0.018`

D

`0.020`

Text Solution

Verified by Experts

The correct Answer is:
B
`n_(R) = 1.527 , n_(y) = 1.530 , n_(b) = 1.535`
`omega = (n_(b) - n_(R))/(n_(y) -1 ) = (1.535 - 1.527)/((1.530 -1))`
`= (0.008)/(0.53) = 0.015`
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