The 80-cm-tall, c=61-cm-wide tank is completely filled with water. The tank has
ID: 2206216 • Letter: T
Question
The 80-cm-tall, c=61-cm-wide tank is completely filled with water. The tank has marks every 10 cm along one wall, and the 0 cm mark is barely submerged. As you stand beside the opposite wall, your eye is level with the top of the water. Which is the lowest mark you can see?
The 80-cm-tall, c=61-cm-wide tank is completely filled with water. The tank has marks every 10 cm along one wall, and the 0 cm mark is barely submerged. As you stand beside the opposite wall, your eye is level with the top of the water. Which is the lowest mark you can see?Explanation / Answer
refractive index of water = 1.33 sin90/sinr = 1.33 sinr = 1/1.33 = 0.751 r = 48.677deg depth = c*cost48.677 = 61*cot(48.677deg) = 53.633
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