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Question: Answered & Verified by Expert
A fish at a depth of $12 \mathrm{~cm}$ in water is viewed by an observer on the bank of a lake. To what height the image of the fish is raised.
PhysicsRay OpticsJEE Main
Options:
  • A $9 \mathrm{~cm}$
  • B $12 \mathrm{~cm}$
  • C $3.8 \mathrm{~cm}$
  • D $3 \mathrm{~cm}$
Solution:
1515 Upvotes Verified Answer
The correct answer is: $3 \mathrm{~cm}$
Apparent rise $=d\left(1-\frac{1}{a \mu_w}\right)$
$\begin{aligned} & =12 \times\left(1-\frac{3}{4}\right) \\ & =12 \times \frac{1}{4}=3 \mathrm{~cm}\end{aligned}$

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