How Deep Does the Penny Appear in a Layered Liquid Tank?

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To determine the perceived depth of a penny at the bottom of a layered liquid tank, one must consider the refraction of light as it passes through the different liquid layers. The problem involves a 15-mm layer of water and a 60-mm layer of carbon tetrachloride, with the penny positioned at the bottom. Utilizing a ray diagram and applying Snell's law will help in calculating the apparent depth. Initial steps include analyzing the refractive indices of both liquids and how they affect the light path. The discussion emphasizes the importance of following the hint provided and sharing any preliminary work for further guidance.
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Homework Statement



A 15-mm-thick layer of water (n = 1.33) floats on a 60-mm-thick layer of carbon tetrachloride (n = 1.46) in a tank. A penny lies at the bottom of the tank. At what depth below the top water surface do you perceive the penny? (Hint: Use the result and assumptions of Problem 21 and work with a ray diagram of the situation.)

How do I get started? DO I find the focal length?
 
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