Fifth book of lessons for the use of schools . It is evident that convergent rays become more con-vergent with convex lenses, and divergent rays moredivergent with concave lenses. ^e shall next explain the refractions of a triangularpiece of glass ealled a prism. The sides are flat; it REFRACTION AND COLOURS. 343

---

Size: 1751px × 1428px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1800, bookdecade1860, bookpublishermontrealjohnlovell