262CHAPTER 22 22.58Horizontal light rays from the setting Sun pass above the hiker. Those light rays that encounter raindrops at 40.0° to 42.0° from the hiker’s shadow are twice refracted and once reflected and reach the hiker as the rainbow. The hiker sees a greater percentage of the violet inner edge, so we consider the red outer edge. The radius Rof the circle of droplets is
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