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+1 vote
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Two identical thin biconvex lenses of focal length 15 cm and refractive index 1.5 are in contact with each other. The space between the lenses is filled with a liquid of refractive index 1.25. The focal length of the combination is ______ cm.

1 Answer

+2 votes
by (41.2k points)
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Best answer

Correct answer is 10

 = 3/10 = 1/10 = 10

by (10 points)
Thanks a lot ❤️

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