Q.

Two thin prisms are combined as shown in the figure. Find the total angular dispersion suffered by a white light after it is passed through the combination of two prisms. The refractive indices of prisms A and B for different lights are listed in the table below.

ColorPrism APrism B
Violet1.51.7
Yellow1.451.6
Red1.41.5
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Detailed Solution

Total angular dispersion =(μvμr)A(μ'vμ'r)A'=0

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