| slovo | definícia |
diffraction
(encz) | diffraction,difrakce n: Zdeněk Brož |
diffraction
(encz) | diffraction,ohyb n: Zdeněk Brož |
Diffraction
(gcide) | Diffraction \Dif*frac"tion\, n. [Cf. F. diffraction.] (Opt.)
The deflection and decomposition of light in passing by the
edges of opaque bodies or through narrow slits, causing the
appearance of parallel bands or fringes of prismatic colors,
as by the action of a grating of fine lines or bars.
[1913 Webster]
Remarked by Grimaldi (1665), and referred by him to a
property of light which he called diffraction.
--Whewell.
[1913 Webster]
Diffraction grating. (Optics) See under Grating.
Diffraction spectrum. (Optics) See under Spectrum.
[1913 Webster] |
diffraction
(wn) | diffraction
n 1: when light passes sharp edges or goes through narrow slits
the rays are deflected and produce fringes of light and
dark bands |
| | podobné slovo | definícia |
diffraction grating
(encz) | diffraction grating, n: |
x-ray diffraction
(encz) | x-ray diffraction,rentgenová difrakce n: [fyz.] mamm |
x-ray diffraction pattern
(encz) | x-ray diffraction pattern,rentgenogram n: [tech.] logbun |
Diffraction
(gcide) | Diffraction \Dif*frac"tion\, n. [Cf. F. diffraction.] (Opt.)
The deflection and decomposition of light in passing by the
edges of opaque bodies or through narrow slits, causing the
appearance of parallel bands or fringes of prismatic colors,
as by the action of a grating of fine lines or bars.
[1913 Webster]
Remarked by Grimaldi (1665), and referred by him to a
property of light which he called diffraction.
--Whewell.
[1913 Webster]
Diffraction grating. (Optics) See under Grating.
Diffraction spectrum. (Optics) See under Spectrum.
[1913 Webster] |
diffraction grating
(gcide) | Grating \Grat"ing\, n. [See 2d Grate.]
1. A partition, covering, or frame of parallel or cross bars;
a latticework resembling a window grate; as, the grating
of a prison or convent.
[1913 Webster]
2. (Optics) A system of close equidistant parallel lines or
bars, esp. lines ruled on a polished surface, used for
producing spectra by diffraction; -- called also
diffraction grating.
Note: Gratings have been made with over 40,000 such lines to
the inch, but those with a somewhat smaller number give
the best definition. They are used, e. g., to produce
monochromatic light for use in optical instruments such
as spectrophotometers.
[Webster 1913 Suppl.]
3. pl. (Naut.) The strong wooden lattice used to cover a
hatch, admitting light and air; also, a movable Lattice
used for the flooring of boats.
[1913 Webster]Diffraction \Dif*frac"tion\, n. [Cf. F. diffraction.] (Opt.)
The deflection and decomposition of light in passing by the
edges of opaque bodies or through narrow slits, causing the
appearance of parallel bands or fringes of prismatic colors,
as by the action of a grating of fine lines or bars.
[1913 Webster]
Remarked by Grimaldi (1665), and referred by him to a
property of light which he called diffraction.
--Whewell.
[1913 Webster]
Diffraction grating. (Optics) See under Grating.
Diffraction spectrum. (Optics) See under Spectrum.
[1913 Webster] |
Diffraction grating
(gcide) | Grating \Grat"ing\, n. [See 2d Grate.]
1. A partition, covering, or frame of parallel or cross bars;
a latticework resembling a window grate; as, the grating
of a prison or convent.
[1913 Webster]
2. (Optics) A system of close equidistant parallel lines or
bars, esp. lines ruled on a polished surface, used for
producing spectra by diffraction; -- called also
diffraction grating.
Note: Gratings have been made with over 40,000 such lines to
the inch, but those with a somewhat smaller number give
the best definition. They are used, e. g., to produce
monochromatic light for use in optical instruments such
as spectrophotometers.
[Webster 1913 Suppl.]
3. pl. (Naut.) The strong wooden lattice used to cover a
hatch, admitting light and air; also, a movable Lattice
used for the flooring of boats.
[1913 Webster]Diffraction \Dif*frac"tion\, n. [Cf. F. diffraction.] (Opt.)
The deflection and decomposition of light in passing by the
edges of opaque bodies or through narrow slits, causing the
appearance of parallel bands or fringes of prismatic colors,
as by the action of a grating of fine lines or bars.
[1913 Webster]
Remarked by Grimaldi (1665), and referred by him to a
property of light which he called diffraction.
--Whewell.
[1913 Webster]
Diffraction grating. (Optics) See under Grating.
Diffraction spectrum. (Optics) See under Spectrum.
[1913 Webster] |
Diffraction spectrum
(gcide) | Spectrum \Spec"trum\, n.; pl. Spectra. [L. See Specter.]
1. An apparition; a specter. [Obs.]
[1913 Webster]
2. (Opt.)
(a) The several colored and other rays of which light is
composed, separated by the refraction of a prism or
other means, and observed or studied either as spread
out on a screen, by direct vision, by photography, or
otherwise. See Illust. of Light, and Spectroscope.
(b) A luminous appearance, or an image seen after the eye
has been exposed to an intense light or a strongly
illuminated object. When the object is colored, the
image appears of the complementary color, as a green
image seen after viewing a red wafer lying on white
paper. Called also ocular spectrum.
[1913 Webster]
Absorption spectrum, the spectrum of light which has passed
through a medium capable of absorbing a portion of the
rays. It is characterized by dark spaces, bands, or lines.
Chemical spectrum, a spectrum of rays considered solely
with reference to their chemical effects, as in
photography. These, in the usual photogrophic methods,
have their maximum influence at and beyond the violet
rays, but are not limited to this region.
Chromatic spectrum, the visible colored rays of the solar
spectrum, exhibiting the seven principal colors in their
order, and covering the central and larger portion of the
space of the whole spectrum.
Continous spectrum, a spectrum not broken by bands or
lines, but having the colors shaded into each other
continously, as that from an incandescent solid or liquid,
or a gas under high pressure.
Diffraction spectrum, a spectrum produced by diffraction,
as by a grating.
Gaseous spectrum, the spectrum of an incandesoent gas or
vapor, under moderate, or especially under very low,
pressure. It is characterized by bright bands or lines.
Normal spectrum, a representation of a spectrum arranged
upon conventional plan adopted as standard, especially a
spectrum in which the colors are spaced proportionally to
their wave lengths, as when formed by a diffraction
grating.
Ocular spectrum. See Spectrum, 2
(b), above.
Prismatic spectrum, a spectrum produced by means of a
prism.
Solar spectrum, the spectrum of solar light, especially as
thrown upon a screen in a darkened room. It is
characterized by numerous dark lines called Fraunhofer
lines.
Spectrum analysis, chemical analysis effected by comparison
of the different relative positions and qualities of the
fixed lines of spectra produced by flames in which
different substances are burned or evaporated, each
substance having its own characteristic system of lines.
Thermal spectrum, a spectrum of rays considered solely with
reference to their heating effect, especially of those
rays which produce no luminous phenomena.
[1913 Webster]Diffraction \Dif*frac"tion\, n. [Cf. F. diffraction.] (Opt.)
The deflection and decomposition of light in passing by the
edges of opaque bodies or through narrow slits, causing the
appearance of parallel bands or fringes of prismatic colors,
as by the action of a grating of fine lines or bars.
[1913 Webster]
Remarked by Grimaldi (1665), and referred by him to a
property of light which he called diffraction.
--Whewell.
[1913 Webster]
Diffraction grating. (Optics) See under Grating.
Diffraction spectrum. (Optics) See under Spectrum.
[1913 Webster] |
diffraction grating
(wn) | diffraction grating
n 1: optical device consisting of a surface with many parallel
grooves in it; disperses a beam of light (or other
electromagnetic radiation) into its wavelengths to produce
its spectrum [syn: diffraction grating, grating] |
x-ray diffraction
(wn) | X-ray diffraction
n 1: the scattering of X rays by the atoms of a crystal; the
diffraction pattern shows structure of the crystal |
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