| Science - 1894
...a single double-convex lens. With such a lens the magnifying power of the telescope is measured by **the ratio of the focal length of the objective to that of the** eye lens. Suppose the first is sixty inches and the latter half an inch ; then the magnifying power... | |
| Garrett Putman Serviss - Astronomy - 1901 - 200 pages
...a single double-convex lens. With such a lens the magnifying power of the telescope is measured by **the ratio of the focal length of the objective to that of the** eye lens. Suppose the first is sixty inches and the latter half an inch; then the magnifying power... | |
| Charles Riborg Mann, George Ransom Twiss - Physics - 1905 - 449 pages
...and L'F is that of the eyepiece; so we see that the magnification of the telescope is determined by **the ratio of the focal length of the objective to that of the eyepiece.** Therefore, if we wish to make telescopes that shall have large magnifying powers, we must so construct... | |
| William H. Lovell - Plane-table - 1908 - 49 pages
...for high and low power, the former for clear and the latter for hazy weather would be a convenience. **The magnifying power of a telescope is the ratio of the focal length of the** eye-piece to that of the object glass. To ascertain the magnifying power, point the telescope towards... | |
| Silas Ellsworth Coleman - Physics - 1908 - 264 pages
...the difference between the focal lengths of the lenses. 2. Compare the estimated magnification with **the ratio of the focal length of the objective to that of the** eye lens. 3. Copy Figure 82 and answer the questions under 4 of the discussion at the end of the preceding... | |
| Charles Elijah Linebarger - Experiments - 1911 - 175 pages
...power of a telescope is equal to (a) the ratio of the size of the image to that of the object; (6) **the ratio of the focal length of the objective to that of the** eye piece. How do the values of the magnifying power measured by the two methods compare? TABULATION... | |
| Encyclopedias and dictionaries - 1920
...about 1850. The magnifying power of telescopes is usually expressed in diameters and is indicated by **the ratio of the focal length of the objective to that of the** combination of lenses forming the eye-piece. For example, the Lick telescope has a focal length of... | |
| United States. Army. Ordnance Dept - Glass manufacture - 1921 - 309 pages
...of the diameter of the entrance pupil to that of the exit pupil, and these in turn are determined by **the ratio of the focal length of the objective to that of the eyepiece.** Another method for ascertaining the linear magnifying power is to measure the angular vergency of the... | |
| United States. Army. Ordnance Department. War Department - 1921 - 307 pages
...of the diameter of the entrance pupil to that of the exit pupil, and these in turn are determined by **the ratio of the focal length of the objective to that of the eyepiece.** Another method for ascertaining the linear magnifying power is to measure the angular vergency of the... | |
| Paul G. Bamberg, Paul Bamberg, Shlomo Sternberg - Mathematics - 1991 - 424 pages
...which equals l +/2 = _/l /2 A' This magnification is negative (the image is inverted) and its magnitude **is the ratio of the focal length of the objective to that of the eyepiece.** The general system We now want to show that any 2x2 matrix with determinant 1 can arise as the matrix... | |
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