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Two glasses with refractive indices of 1...

Two glasses with refractive indices of `1.5 and 1.7` are used to make two indentical double convex lenses.
Find the ratio between their focal lengths.
How will each of these lenses act on a ray parallel to its optical axis if the lenses are submerged into a transparent liquid with a refractive index of `1.6?`

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Verified by Experts

The correct Answer is:
(i) `7//5`
(ii) In this liquid the `1^(st)` lens will be diverging & the `2^(nd)` a converging one
NA
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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Exercise-1
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  11. A point object is placed on the principal axis of a convex lens (f = 1...

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