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Two thin sysmmetrical lenses of differen...

Two thin sysmmetrical lenses of different nature and of different material have equal raii of curvature `R=15cm`. The lenses are put close together and immersed in water `(mu_(w)=4//3)` . The focal length of the system ini water is 30cm. The difference between refractive indices of tthe two lenses is

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The correct Answer is:
`1//3`
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RESNICK AND HALLIDAY-GEOMETRICAL OPTICS : REFRACTION-Problems
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  15. Suppose the prism of Fig. 34-83 has apex angle ph=60.^(@) and index of...

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  16. In Fig. 34-84, a light ray enters a glass slab at point A at incident ...

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  20. An object is placed 1cm above the principal axis of a convex lens of f...

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