The othercolors will arrange themselves in regular order betweenthese two colors. In explaining the primary bow we traced the rays whichfall upon top of the drops of water, but to explain thesecondary bow we trace the rays which fall upon theirunder sides. In order that such rays may reach the… … 12 3 4 Fig. 7S. Lenses. — Any transparent body bounded by two curvedsurfaces, or by one curved and one plane surface, is a lens.With respect to their effect upon light they are of twokinds: convergent and divergent. Of the convergentlenses there are: (i) double convex, (2) plano-convex,(3) meniscus…
Physics
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-172-16.webp)
