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A ray of light is incident at an angle of 60^(@) on one of the faces of a prism which has an angle of 30^(@). The ray emerging out of prism makes an angle of 30^(@) with the incident ray. Calculate the refractive index of material. |
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Answer» 1.1 `THEREFORE I + e = A + D` `therefore 60 + e = 30 + 30` `therefore e = 0` so the emergent ray is `bot` to the face through which it EMERGES Also `r_(1) + r_(2) = A, "here" r_(2) = 0` `therefore r_(1) = 30^(@)` `mu = (SIN 60^(@))/(sin 30^(@)) = (0.866)/(0.5) = 1.732` |
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