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A tank of benzene is 1.5 m deep. How deep does it appear when one is looking vertically downward?
Solution:
The given problem is about the refraction of light in which the incident ray and refracted ray are coincide with the normal line. To illustrate the problem, it is better to draw the figure as follows
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| Photo by Math Principles in Everyday Life |
From the Table of Index of Refraction, the index of refraction of benzene at 20°C is 1.501. Therefore, the apparent depth of a tank of benzene is
