Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 436
is at the surfaceof the lens. Since this distance is proportional to the wave length,details which may be clearly seen when the object is illuminated by bluelight will be indistinct when red light is used. 477. Astronomical Telescope. The object glass of a telescopeforms a real and of course… … Fig. 300. angle a if viewed directly by the eye. If, however, the eye viewsthe image formed by the objective at the distance of most distinctvision, this image will subtend an angle (3 which is larger than a,and the apparent magnification is M^ =/3/ol. When this imageis viewed through an eyepiece,…
Physics
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