A ray of light is incident on a glass prism (n = 1.5) with an angle of incidence 0, = 40°. The ray emerges from the opposite side of the prism with an angle 04. The apex angle of the prism is 60°. The deviation angle, 8, between the incident ray and the emerging ray is then: 60° 8, = 40° 04 Nair =1 38.4° 51.3° 21.7° 44.5° 13.8°

A ray of light is incident on a glass prism (n = 1.5) with an angle of incidence 0, = 40°. The ray emerges from the opposite side of the prism with an angle 04. The apex angle of the prism is 60°. The deviation angle, 8, between the incident ray and the emerging ray is then: 60° 8, = 40° 04 Nair =1 38.4° 51.3° 21.7° 44.5° 13.8°