One face of a prism with refracting angle of 30 is coated with silver .A ray of light incident on another face at an angle of 45 is refracted and reflected from the silver coated face and retraces its path.Find the refractive index of the material of prism.
please explain how to find the angles
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The cross section of glass prism has the form of an isosceles triangle . One of equal face is silvered. A ray of light incident normally on other equal face and after being reflected twice, emerges through base of prism along normal.
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