Physical laboratory experiments : mechanics, optics and heat (1917)
Goodwin, H. M. (Harry Manley), 1870- · Boston : G. H. Ellis Co., Printers · leaf 168
, this image is seen as a magnifiedvirtual image, O4, at a distance C= 10 inches, or 250 millimetersbelow the eye-point, EP, this being the distance of most distinctvision for the normal eye. The distance between Fi and F2is called the optical tube length; the distance, L, is the me-chanical tube… … Fisr. 18. 40 PHYSICAL LABORATORY EXPERIMENTS The various parts of a microscope, Figure 13^ are designatedas follows: £■ = eye-piece. D = draw-tube, for varying the magnification of the object.The graduations on the tube give the value in milli-meters of the mechanical tube length, L, when…
Physics · Mechanics
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