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0. A narrow beam of light is incident on a 300 - 600 - 900 prism perpendicular to the surface AB. Assume that light beam is close to A. The index of refraction of prism is 2.1. See figure and take sin-1() = 280 26'. The beam emerges from the face (NTSE Andhra Pradesh, Stage-I, 2016-17)
CB
AB
AC
Some light through AC and remaining light through AB
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) = 280 26'. The beam emerges from the face 
