The principal section of a glass prism is an isosceles triangle ABC with AB AC...
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Physics
The principal section of a glass prism is an isosceles triangle ABC with AB AC The face AC is silvered A ray of light is incident normally on the face AB and after two reflections it emerges from the base BC perpendicular to the base Angle BAC of the prism is b 36 c 60 a 30 EAMCET 2004 d 72
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