A ray of light is normally incident on one face of an equilateral glass prism. Answer the following :
(a) What is the angle of incidence on the first face of the prism?
(b) What is the angle of refraction from the first face of the prism ?
(c) What will be the angle of incidence at the second face of the prism ?
(d) Will the light ray suffer minimum deviation by the prism ?

Answer

(a) `0^(@)`
(b) `0^(@)`
(iii) `60^(@)`
(iv) No.