A thin prism of crown glass (μr=1.515, μv =1.525) and a thin prism of flint glass ((μr=1.612, μv =1.632) are placed in contact with each other. Their refracting angles are 5.0° each and are similarly directed. Calculate the angular dispersion produced by the combination.

Given that,


Refractive index of crown glass red light = μr=1.515,


And for violet light = μv =1.525


Refractive index of flint glass red light = μr=1.612,


And for violet light = μv =1.632


Refractive Angle= 50


Now,


Since, they are similarly directed, the total deviation produced is given by,




So, angular dispersion of the combination is given by,






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