 | Stephen Parkinson - Optics - 1859 - 344 pages
...the following DEFINITION. When an object is seen through a lens the magnifying power of the lens is the ratio of the angle which the image subtends at the eye — to the angle which the object would subtend at the eye if it were in the position of the image and viewed directly.... | |
 | Popular encyclopedia - 1877 - 526 pages
...When an object is viewed through a lens or a microscope the magnifying power of the optical instrument is defined as the ratio of the angle which the image subtends at the eye to the angle which the object would subtend at the eye if it were in the position of the image and viewed directly... | |
 | Popular encyclopedia - 1884 - 542 pages
...When an object is viewed through a lens or a microscope the magnifying power of the optical instrument is defined as the ratio of the angle which the image subtends at the i vi! to the angle which the object would subtend at Uia eye if it were in the position of the image... | |
 | Edward Leamington Nichols, William Suddards Franklin - Physics - 1897 - 226 pages
...image of the object, and this virtual image is at the distance of most distinct vision from the eye. The magnifying power of a microscope is defined as the ratio of the apparent size of an object, as seen with the microscope, divided by its apparent size, as seen with... | |
 | Robert Alfred Herman - Geometrical optics - 1900 - 366 pages
...object be viewed directly and also through a telescope, the magnification produced is estimated by the ratio of the angle which the image subtends at the eye to the angle which the object subtends when viewed directly in its actual position. This ratio depends on the position... | |
 | Sir Arthur Schuster, Charles Herbert Lees - Physics - 1905 - 396 pages
...as follows: TELESCOPE A. F = 22-0 cms. Hence the focal length/l of the eyepiece = 22/16-3 = T35 cms. MICROSCOPE. The magnifying power of a microscope is defined as the ratio of the apparent size of the image as seen through the instrument, to the apparent size of the object, when... | |
 | William Suddards Franklin, Barry MacNutt - Light - 1909 - 376 pages
...point a of the object appears to have come from the point b after passing through the magnifying glass. The magnifying power of a microscope is defined as the ratio of the apparent size (visual angle) of an object as seen with the microscope to its apparent size (visual... | |
 | Benjamin Warner Snow - Physics - 1909 - 810 pages
...of distinct vision, and therefore in the position X'Y', would subtend the angle X'OY'. Accordingly, the ratio of the angle which the image subtends at the eye to that which the object would subtend at the distance of distinct vision is x Oy X1 O which is the magnifying... | |
 | William Suddards Franklin - Physics - 1916 - 624 pages
...point a of the object appears to have come from the point b after passing through the magnifying glass. The magnifying power of a microscope is defined as the ratio of the apparent size (visual angle) of an object as seen with the microscope to its apparent size (visual... | |
 | Herbert Meredith Reese - Light - 1921 - 318 pages
...Figure 57 AB the object, A'B' the image seen by the eye. We take as a measure of the magnifying power the ratio of the angle which the image subtends at the eye to that which the object itself would subtend if the lens were removed and the object put back where it... | |
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When an object is viewed through a lens or a microscope the magnifying power of the optical instrument is defined as the ratio of the angle which the image subtends at the eye to the angle which the object... 
