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A fish looking up through the tank sees the outside world contained in a circular horizon. If the refractive index of water is 4/3 and the fish is 12cm below the surface,what is the radius of the circle in cm ? (please see attachment for diagram)
After makig the figure U would get the final relation astanthetha = r/hwhere thetha is the angle making with height h (perpendicular and the hypertenuse.)and this angle is also the TIR angle.Therfore from,sinthetha = 1/u = ¾thanthetha = 3/root(7)and r = 36/root(7)
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