Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 235
tration. Fig. 40. That is, if-from the optical centre, with a radius equalto the principal focal distance, we describe the arc of acircle, and this arc cut the object, the image of all thatpart of the object in-cluded between thepoints of intersectionA and A! will be vir-tual, while that of… … Equation (51)transformed; ,,, . Fu.f. tan 6 f.smd=-j- J . (55) COS $ and giving to 0, its greatest value for any assumed object,f tan 0 will be the length of that portion of the object on ELEMENTS OF OPTICS. 227 the positive side of the axis as long as & is positive and less Explanation ofthan…
Mechanics · Acoustics · Optics
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