Ononot — A light beam travels from point A(0,1) to B(2,1) through a m

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Real-World Applicationshard

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A light beam travels from point $A(0,1)$ to $B(2,1)$ through a medium where $v = y$ . According to Fermat's principle (minimizing travel time $\int \frac{1}{v} ds$ ), what is the shape of the path?