A thin prism of angle 6.0°, ω=0.07 and μy =1.50 is combined with another thin prism having ω=0.08 and μy =1.60. The combination produces no deviation in the mean ray. A Find the angle of the second prim. B Find the net angular dispersion produced by the combination when a beam of white light passes through it. C If the prisms are similarly directed, what will be the deviation in the mean ray? D Find the angular dispersion in the situation described in C.

Given that,


For first Prism


Prism Angle = A1 = 60


Dispersion Power = ω1 = 0.07


Refractive Index = μ1 = 1.50


For Second Prism


Prism Angle = A2 = ?


Dispersion Power = ω2 = 0.08


Refractive Index = μ2 = 1.60


The combination produces no deviation in the mean ray.


(a)






(b) When a beam of white light passes through it,


Net angular dispersion =


=


=


(c) If the prisms are similarly directed,





(d) Similarly, if the prisms are similarly directed,


the net angular dispersion is given by,





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