. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. Fia. 378.—Diagram illustrating the Formation, by a Double Convex Lens, of a Smaller Inverted Image. (Oanot.) must be formed behind the lens. If a screen be placed at this point, which corresponds to the focal length of the lens, it is evident that the image will be distinctly defined. On the other hand, if the screen be either approached or removed farther from the lens an indistinct image will be formed. If the object be farther removed from t
. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. Fia. 378.—Diagram illustrating the Formation, by a Double Convex Lens, of a Smaller Inverted Image. (Oanot.) must be formed behind the lens. If a screen be placed at this point, which corresponds to the focal length of the lens, it is evident that the image will be distinctly defined. On the other hand, if the screen be either approached or removed farther from the lens an indistinct image will be formed. If the object be farther removed from the lens the image will decrease in size, and to have a distinct image the screen must be approached to the lens; and, conversely, if the object be approached. Fig. 379.—Diagram illustrating the Formation of an Image by a Double Convex Lens. to the lens the image will be increased in size, and to have sharp definition the screen must be moved farther from the lens. A similar process occurs within the eye, although the refraction of rays of light is much more complicated than in the simple convex lens, for in the eye the ray of light passes through several media and is refracted by each. Nevertheless, in the eye, a small inverted image is formed on the retina, as may be readily determined by removing the eye from a recently killed animal, and if the sclerotic be removed from the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Robert Meade, 1854-. Philadelphia and London, F. A. Davis
Size: 2438px × 1025px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysiol, bookyear1890
