"Focal distance" Quotes from Famous Books
 ... seen that the glass placed at the observer's eye produces the magnifying power, and the object-glass which bears this power the best is the one that has the largest diameter and the greatest focal distance. In order to magnify 48,000 times it must be much larger than those of Herschel and Lord Rosse. There lay the difficulty, for the casting of these mirrors is ...
— The Moon-Voyage • Jules Verne
... follows that a small picture, being viewed at its proper focal distance, reflects the same sized image as a larger one at its proper focal distance, I can see no good reason why the physical attribute of largeness should be so eagerly sought for by the public. Surely a gallery of small pictures, provided they be not painfully small, should be preferred ...
— The Knickerbocker, or New-York Monthly Magazine, February 1844 - Volume 23, Number 2 • Various
... convenient size, varying from six to ten inches in length, fitted with two lenses—one at the object end, to throw light from a lamp through the instrument, and the other at the eye end, through which the image is projected on a screen, placed at the proper focal distance. Any ingenious boy can fit these lenses to an ordinary kaleidoscope, and fit it to a stand, which may be ...
— Harper's Young People, July 20, 1880 - An Illustrated Weekly • Various
... man seems to himself to be material sub- 301:24 stance, while man is "image" (idea). Delusion, sin, dis- ease, and death arise from the false testimony of material sense, which, from a supposed standpoint outside the 301:27 focal distance of infinite Spirit, presents an inverted image of Mind and substance with ...
— Science and Health With Key to the Scriptures • Mary Baker Eddy |
