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Using the following data calculate the refractive index of the material of the convex lens. Radii of curvature of both the surface are 0.2m . Data recorded in the shift method to determine the focal length of the convex lens are a follows : |
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Answer» SOLUTION :`f = (D^(2) -S^(2))/( 4D)` `f = ( D^(2) - S^(2))/( 4D) = ( 0.82^(2) -0.128^(2))/( 4 XX 0.82) = 0.2m` `f = ( D^(2) - S^(2))/( 4D ) = ( 0.9^(2) - 0.3^(2))/( 4 xx 0.9) = 0.2m` `f_(av) =0.2m` `N = 1+ ( 1)/( f) ( R_(1) R_(2))/( (R_(1)+R_(2)))` `n = 1+ ( 1)/( 0.2) (0.2 xx 0.2)/( ( 0.2+ 0.2))` n = 1.5 |
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