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Calculate the refractive index of the material of the lens using the given data. Radius of curvature of the first surface R_(1) = 0.2m Radius of curvature of the second surface R_(2) =0.2 m. |
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Answer» Solution :Trial 1`:``F= ( D^(2) -S^(2))/( 4D)` `f = ((0.9)^(2) - (0.3)^(2))/(4 xx 0.9)` `f= ( 0.72)/( 0.35 ) = 0.2m` Trial 2 `:``f = ( (0.85)^(2) - ( 0.2)^(2))/(4 xx 0.85)` `f = (0.6784)/(0.34)` Average,`f = 0.199m` ` N = 1+ ( R_(1) R_(2))/(f(R_(1)+R_(2)))` `n = 1+ ( 0.2 xx 0.2)/( 0.1997 xx 0.4)` `n = 1.5 ` |
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