Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
204 OPTICS. S63. Figure 2.—Visible bodies emit light from every point, and in every direction, Fig. 2. … tlie rays diverging from eachpoint in straight lines. Thetwo eyes, in the figure, receiverays of light from the samethree points of the arrow, butnot the same rays. So eachand every point of the objectemits light in every direc-tion, but the eye in any oneposition only takes in therays that come in…
Physics · Astronomy
Internet Archive · University of Connecticut Library · Public Domain Mark 1.0. Free to use for anything.
![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-364-42.webp)
