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Flint glass prism is joined by a crown g...

Flint glass prism is joined by a crown glass prism to produce dispersion without deviation. The refractive indices of these for mean rays are 1.602 and 1.500 respectively. Angle of prism of flint prism is `10^@`, then the angle of prism for crown prism will be

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The correct Answer is:
B
`delta_(net)=0`
`(n_(y_(1))-1)A_(1)-(n_(y_(2))-1)A_(2)=0`
`(1.500-1)A_(1)=(1.600-1)10^(@)`
`A_(1)=12.04^(@)`
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