Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 486
Zentmayer—A Lecture on Lenses. 427 … N ^ before, spherical aberration. If we placea screen at the principal focus F, it vriUnot receive a distinct image, even if wehave a concave screen; as will be ob-served, all the rajs outside of the axisarrive at different distances behind thelens. You notice that none but the raysA^^ and A^^ and…
Science · Technology · Meteorology · Patents
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
