Two prisms A and B have dispersive powers of 0.012 and 0.018 respectively. The two prisms are in contact with each other. The prism A produces a mean deviation of 1.2^(@), the mean deviation produced by B if the combination is achromatic is

Two prisms A and B have dispersive powers of 0.012 and 0.018 respectiv

1.	Two prisms A and B have dispersive powers of 0.012 and 0.018 respectively. The two prisms are in contact with each other. The prism A produces a mean deviation of 1.2^(@), the mean deviation produced by B if the combination is achromatic is
Answer» `3.6^(@)` `0.8^(@)` `0.4^(@)` `1.8^(@)` ANSWER :B

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Two prisms A and B have dispersive powers of 0.012 and 0.018 respectively. The two prisms are in contact with each other. The prism A produces a mean deviation of 1.2^(@), the mean deviation produced by B if the combination is achromatic is

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