Q10 of 26 Page 1

A ray PQ incident on the refracting face BA is refracted in the prism in the figure and emerges from the other refracting face AC as RS such that AQ=AR. If the angle of prism A= 60° and refractive index of material of prism is √3, calculate angle θ.




Given, μ=√3




So, (By triangle sum property in ΔAQR)


Also,


So,



By properties of prism,


When , then


By Snell’s law,



∴


Now, the angle of deviation θ is



So,


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