A ray of light strikes the midpoint of one face of an equiangular (60 degree -60

Question

A ray of light strikes the midpoint of one face of an equiangular (60 degree -60 degree -60 degree) glass prism (n = 1.5) at an angle of incidence of 30 degree. Trace the path of the light ray through the glass, and find the angles of incidence and refraction at each surface. 1st surface: theta incidence = 30 theta refraction = 19.45 2nd surface: theta incidence = 49.45 theta refraction = 49.45 If a small fraction of light is also reflected at each surface, find the angles of reflection at the surfaces. theta refraction = 19.3 (1st surface) theta refraction = (2nd surface)

Explanation / Answer

2nd surface r2=angle of incidence at the secondsurface=60-19.45=40.55degree. angle of refraction=i2 we have 1.5 =sini2/sin40.55 so i2=77.20degree. angle of reflection at the first face=30degree. angle of reflection at the second face=40.55degree.

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