Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 207
centre F\ corres-ponding to a radius f, its number of degrees, denotedby », becomes, , a . 360° 1n = —-, and dividing the first of these Equations by the second,we find, Eatio of theabove values; n 1 7T Conclusion for diverging rays. whence we conclude that — and — measure the relative f f… … Conclusion for converging rays; vertex 0, becomes negative, and the relative measure / / 5 for the convergence of these rays will be negative.Again, if the incident rays converge to a point F,before deviation, f for the same reason, wrould be ne-gative, and the measure for the corresponding…
Mechanics · Acoustics · Optics
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