In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are and respectively. The condition for getting deviation without dispersion when the two prisms are combined is |
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a) |
b) |
c) |
d) |

In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are and respectively. The condition for getting deviation without dispersion when the two prisms are combined is |
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a) |
b) |
c) |
d) |

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