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A ray in incident normally on a right an...

A ray in incident normally on a right angle prism whose refractive index is `sqrt(3)` and prism angle `alpha=30^(@)`. After crossing the prism, ray passes through a glass sphere. It strikes the glass sphere at `(R)/(sqrt(3))` distance from principal axis, as shown in the figure. The is half polished. Find the totol angle of deviation of the incident ray after all reflections and refractions from this optical setup

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The correct Answer is:
`180^(@)`
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