Assume that the speed of light in a given slab of material is proportional to the height
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Assume that the speed of light in a given slab of material is proportional to the height above the base of the slab.13 Show that light moves in circular arcs in this material; see Fig. You may assume that light takes the path of least time between two points (Fermat??s principle of leasttime).
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Let the path be described by y x The speed at height y is v y Therefore the time to ...View the full answer
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