Crossword-Solution: DISPERSIVE
Dictionary
| Word | Word Type | Definition |
|---|---|---|
| Dispersive | a. | Tending to disperse. |
We have 1 clue for the answer “DISPERSIVE”
| Clue | Answers |
|---|---|
| tending to disperse | 1 answer |
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On the back of an animal
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Hint 1 meaning
Pertaining to, or situated near, the back, or dorsum, of an
animal or of one of its parts; notal; tergal; neural; as, the dorsal
fin of a fish; the dorsal artery of the tongue; -- opposed to ventral.
Hint 2 anagram
AROLDS
Hint 3 another clue
BACK ___!
12 +1
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Sentences with DISPERSIVE (5)
Achromatic lens (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed.
Since the discovery by Dollond, in 1758, of the relation between the refractive and dispersive powers of different kinds of glass, and the invention by that distinguished optician of the achromatic telescope, the manufacture of that instrument had been confined to England, where the best flint glass was made.
Two great optical barriers, known technically as spherical and chromatic aberration--the one due to a failure of the rays of light to fall all in one plane when focalized through a lens, the other due to the dispersive action of the lens in breaking the white light into prismatic colors--confronted the makers of microscopic lenses, and seemed all but insuperable.
Very roughly speaking, plain white glass, such as that of which the chimneys of oil-lamps and incandescent gas-burners are composed, is quite transparent, and therefore affords no protection to the eyesight; a protective globe should be rather of ground or opal glass, or of plain glass to which a dispersive effect has been given by forming small prisms on its inner or outer surface, or both.
Such opal, ground, or dispersive shades waste much light in terms of illuminating power, but waste comparatively little in illuminating effect well designed, they may actually increase the illuminating effect in certain positions; a tinted globe, even if quite plain in figure, wastes both illuminating power and effect, and is only to be tolerated for so-believed aesthetic reasons.