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Find the angle of flint glass prism whic...

Find the angle of flint glass prism which produces the same angular dispersion for `c` and `F` wavelengths in `10^(@)` crown glass prism.
For crown glass : `mu_(F) = 1.5230, mu_( c) = 1.5145`
For flint glass : `mu'_(F) = 1.6637, mu'_( c) = 1.6444`.

Text Solution

Verified by Experts

The correct Answer is:
`4.4^@`
As angular dispersion is same.
`:. (mu'_F - mu'_c) A' = (mu_F -mu_c) A`
`(1.6637 - 1.6444) A' = (1.5230 - 1.5145) xx 10^@`
`A' = (0.0085 xx 10)/(0.0193) = 4.4^@`.
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