A point source of light is placed at the bottom of a water lake. If the area of the illuminated circle on the surface is equal to 3 times the square of the depth of the lake. The refractive index of water is

A point source of light is placed at the bottom of a water lake. If th

1.	A point source of light is placed at the bottom of a water lake. If the area of the illuminated circle on the surface is equal to 3 times the square of the depth of the lake. The refractive index of water is
Answer» `SQRT(PI+1)` `sqrt((pi)/3+1)` `(pi)/3+1` `(pi)/4+1` ANSWER :B

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A point source of light is placed at the bottom of a water lake. If the area of the illuminated circle on the surface is equal to 3 times the square of the depth of the lake. The refractive index of water is

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