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The following is a standard problem found in many textbooks:
Problem: Three flat layers and transparent material are stacked upon one another. The top layer has an index of refraction n1, the middle has n2 and the bottom one has n3. If n1<n2<n3, at what angle of incidence will a ray of light traverse the three layers in a single straight line?
Please show the work for the calculation so I can understand what I'm doing. Thanks!
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