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A luminous object O is located at the bo...

A luminous object O is located at the bottom of a big pool of liquid of refractive index `mu` and depth h. The object O emits rays upwards in all directions, so that a circle of light is formed at the surface of the liquid by the rays which are refracted into the air. what happens to the rays beyond the circle ? Determine the radius and the area of the circle .

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