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A certain prism is that to produce minimum deviation of38^(@). If produces a deviation of 44^(@) when the angle of incidence is either 42^(@) or 62^(@). What is refractive index of material of prism? |
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Answer» 1.51 I + e = A + D 42 + 62 = A + 44 or A = `60^(@)` When deviation is min. I = e `therefore I + I = 60 + 38 = 49^(@)` Now `MU = (A)/(2) = sin ((A + D_(m))/(2))` `or "" mu=(sin((60+38)/(2)))/(sin30^(@))=1.51` |
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