A flint glass block (n 1.69) is 8 cm thick and rests on the bottom of...

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A flint glass block (n 1.69) is 8 cm thick and rests on the bottom of an aquarium tank. The upper surface of the block is 12 cm below the surface of the water in the tank. Calculate the apparent thickness (in cm) of the block as viewed from above the water. (You can assume that the viewing angle is small). A flint glass block (n 1.69) is 8 cm thick and rests on the bottom of an aquarium tank. The upper surface of the block is 12 cm below the surface of the water in the tank. Calculate the apparent thickness (in cm) of the block as viewed from above the water. (You can assume that the viewing angle is small).