write necessary condition for deviation without dispersion
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Explanation:
The essential condition for dispersion without deviation is that deviation produced by crown glass prism is equal to the deviaction produced by flint glass prism.
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Necessary condition for deviation is crown glass prism and flint glass prism .
Explanation:
- The essential condition for dispersion without deviation is that deviation produced by crown glass prism is equal to the deviation produced by flint glass prism.
- Let the refractive indices of crown and flint glass prisms for mean ray are , then deviation of mean ray by crown prism.
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