A. 10.5°
B. 19.5°
C. 21.1°
D. 38.9°
E. 40.5°
Correct Answer:
Option A – 10.5°
Explanation
n = sin i/sin r
sin r = 30°/n
sin r = 0.51.5
sin r = 0.3333
r = 19.5°; Deviation 30 – 19.5 = 10.5°
![A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]")
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