ray
nouna line of light, or the right line supposed to be described by a particle of light. a collection of parallel rays constitutes a beam; a collection of diverging or converging rays, a pencil. The mixed solar beam contains, 1st. calorific rays, producing heat and expansion, but not vision and color; 2d. colorific rays, producing vision and color, but not heat nor expansion; 3d. chimical rays, producing certain effects on the composition of bodies, but neither heat, expansion, vision or color; 4th. a power producing magnetism, but whether a distinct or associated power, is not determined. It seems to be associated with the violet, more than with the other rays.