A ray of light passes through an equilateral prism such that the angle of incidence is equal to 34th the angle of emergence and the latter is equal to 3/4th of the angle of prism. The angle of deviation is
30∘
As angle of incidence is equal to the angle of emergence; the prism is in the minimum deviation position. Given A=60∘ i=34×60=45∘
45=60+δm2 or δm=30∘