one of the faces of a prism of refracting angle 30? is silvered. a ray of light incident at an angle 45 degree on the other face returns along its previous path after reflection and refraction from the silvered face, the refractive index of the prism is _______

Dear Student
Given A = 30oi2 = 0o    Because the refracted ray retracts its pathr2 = 0r1+r2 = Ar1+0 = Ar1 =A = 30oμ =sin i1sin r1 =sin 45sin 30 =1212 = 1.414


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