Physics - Geometrical Optics Question with Solution | TestHub

Beam of light incident on face $AB$, suffers refraction from air to glass and strikes the face $AC$ suffering total internal reflection. The beam now strikes the face $BC$ of the prism at an angle of incidence less than the critical angle hence it suffers refraction from glass to air and bends away from the normal. The beam emerges out parallel to the base. As a result of refraction, on emergence the rays are inverted.