Question

​a coin is placed at the bottom of a swimming pool.To obtain a vertical shift of 20 cm of the image of the coin,the required hieght of the water column is?

Answer 1

Answer:

Explanation:

Let here the actual depth is d and the apparent depth is d1 .

So the vertical shift is d - d1 = 20 cm.

Now the refractive index is , μ=d/d1

⇒d1=d/μ

So ,d−d1=d−d/μ

             =d(μ−1/)μ

        20=[d×(4/3−1)] / (4/3)

            =d×1/4

         d=80 cm .

Answer 2

Answer:

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