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A beam of light coming from infinty is passing through a biconvex lens having radius of curvature `R=20cm` of each surface, if focused at a certain distance from lens. Find the radius of curvature of emergent wave front from lens : (`mu lens =1.5`)A. `10cm`B. `5cm`C. `1cm`D. `20cm` |
| Answer» Here `f=RrArr` radius of curvature `=R` | |