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A ray of light is incident on a glass prism (n 1.5) with an angle of incidence 6, = 40/The ray
emerges from the opposite side of the prism with an angle 0,. The apex angle of the prism is
60. The deviation angle, 6, between the incident ray and the emerging ray is then:
60
e, = 40
nair1
13.8
44.5
21.7°
38.4°
51.3°

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