Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 257
ion (72), by Fu. (F„), it becomes, A A m i~ F. n Magnifyingpower in termsof the powers ofthe lenses; and denoting by Z, the power of the field, and by l% thatof the eye lens, we have A^A L • • • • (75) Ratio of visualangles; 243 NATURAL PHILOSOPHY. Rule for magnifying power. that is, the magnifying… … Generalexplanation; Q § 79. If E, be the optical centre of the field, and 0that of the eye lens of an astronomical telescope, theline E 0, passing through the points E and 6>, is calledthe axis of the instrument. Let Qr P be any objectwhose centre is in this axis, and q p> its image. Now,in…
Mechanics · Acoustics · Optics
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