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Question

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 10o, then the angle of prism for crown prism will be

A
122.4
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B
124
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C
1.24
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D
12
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Solution

The correct option is A 122.4
For dispersion without deviation ACAF=(μF1)(μC1)A10=(1.6021)(1.5001)A=12.04=122.4

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