A thin prism of angle 15o made of glass of refractive index $\mu $1 = 1.5 is combined with another prism of glass of refractive index $\mu $2 = 1.75. The combination of the prisms produces dispersion without deviation. The angle of the second prism should be

Question

A thin prism of angle 15^o made of glass of refractive index $\mu $₁ = 1.5 is combined with another prism of glass of refractive index $\mu $₂ = 1.75. The combination of the prisms produces dispersion without deviation. The angle of the second prism should be

5^o

7^o

10^o

12^o

Solution

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