Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The focal length of a convex lens is 
. Now, the lens in submerged in water 
. Find the ratio of focal length in medium to focal length in air.
Text Solution
Verified by ExpertsThe correct answer is:
4
(4) 
(i)
Similarly, 
(ii)
Dividing Eq. (i) by Eq. (ii), we get
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