A ray of light incident at 60^(@) on a prism undergoes a deviation of 20^(@). If the angle of the prism is 40, S.T. the emergent ray is normal to the second face of the prism.

A ray of light incident at 60^(@) on a prism undergoes a deviation of

1.	A ray of light incident at 60^(@) on a prism undergoes a deviation of 20^(@). If the angle of the prism is 40, S.T. the emergent ray is normal to the second face of the prism.
Answer» SOLUTION :`d=(i_(1)+i_(2))-A` `20^(2)=60^(@)+i_(2)-40^(@)` `THEREFORE i_(2)-0`. Hence, emergent ray is normal to the face of the prism.

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A ray of light incident at 60^(@) on a prism undergoes a deviation of 20^(@). If the angle of the prism is 40, S.T. the emergent ray is normal to the second face of the prism.

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