Crossword-Solution: ACHROMATISM
Dictionary
| Word | Word Type | Definition |
|---|---|---|
| Achromatism | n. | The state or quality of being achromatic; as, the achromatism of a lens; achromaticity. |
We have 2 clues for the answer “ACHROMATISM”
| Clue | Answers |
|---|---|
| Being without color | 1 answer |
| discolouration | 49 answers |
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Hint 1 meaning
The superficial contents of any figure; the surface included
within any given lines; superficial extent; as, the area of a square or
a triangle.
Hint 2 anagram
EARA
Hint 3 another clue
CERTAIN BRAIN SIZE
30 +2
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Sentences with ACHROMATISM (5)
And the mere fact that the problem of achromatism was solved by "the mind of a sagacious optician inquiring how this matter was managed in the eye," no more proves that "this could not be in the eye without purpose, which suggested to the optician the only effectual means of attaining that purpose," than would the fact, say, of the winnowing of corn having suggested the fanning-machine prove that air currents were designed for the purpose of eliminating chaff from grain.
This increase is due in part to the diffraction of the telescope, to imperfect achromatism or spherical aberration of the objective, to irregular grinding of the glass, and especially to variations in the refraction of the air, which produce an oscillation of the image around a mean position.
True achromatism cannot be obtained with ordinary flint and crown-glass; and although in lenses of "Jena glass," outstanding colour is reduced to about one-sixth its usual amount, their term of service is fatally abridged by rapid deterioration.
The perfect achromatism of a reflector is, of course, a great advantage, but the chromatic aberration of refractors is now so well corrected that their inferiority in that respect may be disregarded.
Leonhard Euler in 1747 had suggested that achromatism might be obtained by the combination of glass and water lenses.