1 8 A thin prism P with 4 and made from glass of refractive index 1 54 is combined with another thin prism P made from glass of

Question

1 8 A thin prism P with 4 and made from glass of refractive index 1 54 is combined with another thin prism P made from glass of refractive index 1 72 to produce dispersion without deviation The angle of the prism P is degree

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