Posted by **Anab** on Friday, November 2, 2012 at 10:18am.

A swimming pool filled with water to its edge, the depth of the water is 2m and an electric lamp is placed at a distance equals 8m from the edge of the pool over a column its height 6m. Calculate the length of non-apparent part from the pool bottom with the light does not reach to it, given the refractive index of water is 4?3.

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