A) \[-20\,cm\]
B) \[-25\,cm\]
C) \[-50cm\]
D) \[50\,cm\]
Correct Answer: C
Solution :
Given ![]() |
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From Lens Maker's formula for the piano convex lens |
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Here, ![]() |
and for plane surface ![]() |
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When the intervening medium is filled with oil, then focal length of the concave lens formed by the oil |
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Here, we have two concave surfaces |
So. ![]() |
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