Physics Optics Refraction and Reflection

A ray of light incident at an angle θ on the face AB of a prism of refractive index 1.5 emerges normally from its face AC. If the angle of the prism is 5°, the angle of incidence θ should be nearly

1

2.5°

2

7.5°

3

22.5°

4

82.5°

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