ns and reflectionsof light by the falling drops of rain. In the primary bow thereis one reflection and two refractions, and in the secondary thereare two reflections and two refractions. Let O Pho a. lino drawn from the eye of the observer to the centre of therainbows, and lot A, B. C. and Z>,… … behind the drop, but those that fall upon the upper side of the drop willbe refracted, the red least and the violet most, and will fall upon theback of the dop so obliquely that some of them will be reflected as shewnin Fie 43. Upon again passing out of the drop they are refracted f r ^R 142…
Physics
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