Apparent change in target reflectivity. Motion of the target causes successive radar pulses to bounce off different parts of the target, such as fuselage and wingtip.
Generic term for rapid variations in apparent position, brightness, or color of a distant luminous object viewed through the atmosphere.
Scintillation is the sparkle or flashing effect seen when a diamond moves in the light.
It is a slight and rapid shifting of a spot of light or the image of an object about its mean position.
The sparkle, which is the combination luster, brilliance, and dispersion when there is movement by the wearer or light source.
Sparkle. The tiny flashes of light noticeable in a diamond when the observer moves his/her head.
The "twinkling" of a celestial object or the rapid variations in a star's brightness. This twinkling is caused by changes of the air temperature in the Earth's atmosphere. Changes in air temperature causes turbulence which varies the bending of the light entering the atmosphere.
Light produced by the interaction of ionizing radiation with a fluor.
The display of reflections from the polished facets of a gemstone seen by the observer when either the illuminant, the gemstone or the observer is in motion—a flashing or twinkling of light from the facets.
Scintillation is the intense sparkling in a diamond as it moves. Black and white sparkles of scintillation show well in flood lit or office lighting environments where fire can be totally absent. Under pin point or spot lights, fire also adds to scintillation. Ideally a diamond has many pleasing flashes spread across the surface of the stone, with few dull dead patches.
The emission of light that occurs when electrons or positrons excite a substance in a transparent material they are passing through.
(physics) a flash of light that is produced in a phosphor when it absorbs a photon or ionizing particle
a rapid change in brightness; a brief spark or flash
the quality of glittering or sparkling brightly
the twinkling of the stars caused when changes in the density of the earth's atmosphere produce uneven refraction of starlight
The perception of twinkling light of varying intensity that can occur during the migraine aura.
The apparent ability of a gem to create more rays of light than entered it. It is accomplished by placing numerous facets on the gem, as in the Portuguese cut. When the gem is properly cut for brilliance as well the effect can be stunning.
The twinkling of stars, resulting from atmospheric disturbance.
1. Sparkle: The appearance, or extent, of spots of light seen in a polished diamond when it is viewed face-up that flash as the diamond, observer, or light source moves. 2. Pattern: The relative size, arrangement, and contrast of bright and dark areas that result from the internal and external reflections seen in a polished diamond when it is viewed face-up while that diamond is still or moving.
When light reflects off of a diamond, the sparkle that emanates from the facets of the gem is called scintillation.
When light reflects from a diamond the sparkling flashes you see are from the facets and are known as scintillation.
Sometimes called "sparkle," scintillation refers to the tiny flashes of light when the diamond, the light source, or the observer moves. It depends on the number, size, and position of the facets. The quality of the polish affects scintillation, too.
As the diamond, observer or light source is moved, reflections and flashes of white light (scintillation) emanate from the diamond's surface.
This is the term for changing colours, the radiance and sparkle of the rays when the stone is moved or when the light source changes. The GemEx Brilliancescope (tm) analyzer that we use for all of our diamonds measures the number of light points and determines how they change from position to position.
Small sparkle of lights that reflect from a diamond.
The display of reflections from a stone as the stone, the light source and/or the observer moves.
The "sparkling" of textures or small objects. Usually undesirable and caused by aliasing.
When light reflects from a diamond, the sparkling flashes that come from the facets of the gem are known as scintillation.
Winking or flashing of light from the facets of a diamond as it moves. Scintillation explains why diamonds are much more beautiful when they are in motion.
Scintillation is the twinkling of stars (fluctuation of intensity) seen through a planet's atmosphere. Scintillation in caused when the star's light is distorted by the Earth's atmosphere. Scintillation is greater for bright stars that are low on the horizon. It is also known as astronomical scintillation.
A flash of light produced in a phosphor by an ionizing particle or photon.
Flashes of reflected light from a diamond when it moves. Commonly referred to as sparkle.
A diamond's "sparkle" - the flashes of light reflected from a diamond's facets when the diamond is moved.
Scintillation (flashing or twinkling of light) in gemstones refer to the alternating display of reflections from the polished facets when in motion.
The breaking up of light into tiny constituents, a function of the facets of a gem.
Scintillation or twinkling are generic terms for rapid variations in apparent brightness or color of a distant luminous object viewed through the atmosphere.
Scintillation is a flash of light produced in a transparent material by an ionization event. See scintillator and scintillation counter for practical applications.
Scintillation is a fluctuation in the amplitude of a target on a radar display. It is closely related to target glint, or wander, an apparent displacement of the target from its mean position. This effect can be caused by a shift of the effective reflection point on the target, but has other causes as well.