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A vessel having perfectly reflecting pla...

A vessel having perfectly reflecting plane botton is filled with water `(mu=4//3)` to depth d. A point source of light is placed at a height h above the surface of water. Find the distance of final image from water surface.

Text Solution

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If y is the apparent distance of the coin, then
`y=40/(mu)`
`=40/(4//3)=30cm`
If h is the height of the lamp the water surface, then its image will be at a distance h below the water surface. Both the images to be coincide h=30 cm
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