| 单词 | circle of dissipation |
| 释义 | > as lemmascircle of dissipation b. Optics. The scattering or dispersion of rays of light. circle of dissipation, radius of dissipation: see quots. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > chromatism > [noun] > formation of spectrum dispersion1728 dissipation1749 anomalous dispersion1872 1749 D. Hartley Observ. Man i. ii. 219 Narrow the Pupil of the Eye, i.e. lessen the Radius of Dissipation. 1753 Chambers's Cycl. Suppl. (at cited word) Circle of Dissipation..is used for that circular space upon the retina, which is taken up by one of the extreme pensils of rays issuing from an object..Radius of Dissipation, the radius of the circle of Dissipation. 1794 G. Adams Lect. Nat. & Exper. Philos. II. xvii. 308 The circular spaces..illuminated by pencils of rays..are called circles of dissipation. 1867 J. Hogg Microscope (ed. 6) i. ii. 22 Produced by the central rays falling in a circle of dissipation, before they have come to a focus. < as lemmas |
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