A ray of light is incident on a glass prism (n = 1.2) 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: 0, = 40° 09 Natr =1 13.8 51.3 38.4 O 44.5°
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