A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3 4 of the angle of the prism. The angle of deviation is

Step-by-step solution

For an equilateral glass prism, Angle of prism, A=60^ If i and c be the angle of incidence and angle of cmergence respectively, then i= 3 4 A= 3 4 60^ =45^ and e=i=45^ For a prism, we know that aligned A+ & =i+c =i+e-A & =45^ +45^ -60^ =90^ -60^ =30^ aligned