A ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and each one is equal to 3 / 4 th the angle of prism. The angle of deviation is

Step-by-step solution

Relation among the (i),(e),(A) and ( )i+e=A+ 3 4 60^ + 3 4 60^ =60^ + or 45^ +45^ =60^ + or =30^ where, i= angle of incidence e = angle of emergence A = angle of prism = angle of deviation