An isosceles prism of angle 120° has a refractive index of 1.44. Two parallel monochromatic rays enter the prism parallel to each other in air as shown. The rays emerging from the opposite faces


(a) Are parallel to each other

(b) Are diverging

(c) Make an angle 2sin-10.72 with each other

(d) Make an angle 2sin-10.72-30° with each other

(d) At point A. sin 30°sin r=11.44


         r=sin-10.72   and BAD=180°-r   

           In rectangle ABCDA+B+C+D=360°




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