Crossword clues for shadowgraph
Wiktionary
n. 1 A shadow-picture; a radiograph or X-ray photograph; a sciagram. 2 (context physics English) An optical technique of visualizing patterns of fluid flow by using differences in refractive index vb. 1 (context transitive English) To outline in a shadow-picture on a screen. 2 (context photography English) To take a picture by means of X-ray, radium, or similar source of actinic radiation.
WordNet
n. a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) [syn: radiogram, radiograph, skiagraph, skiagram]
Wikipedia
Shadowgraph is an optical method that reveals non-uniformities in transparent media like air, water, or glass. It is related to, but simpler than, the schlieren and schlieren photography methods that perform a similar function. Shadowgraph is a type of flow visualisation.
In principle, we cannot directly see a difference in temperature, a different gas, or a shock wave in the transparent air. However, all these disturbances refract light rays, so they can cast shadows. The plume of hot air rising from a fire, for example, can be seen by way of its shadow cast upon a nearby surface by the uniform sunlight.
Usage examples of "shadowgraph".
I have done foolishly to dwell With Fear upon her desert isle, To take my shadowgraph to Hell, And then to hope the shades would smile.
His voice joined other shouts and the screeching of the gulls in the smoke and dust and he gradually began to discern crouched figures, like a shadowgraph in slow motion.
His hands, silhouetted against the swiftly rising flame of the wick to which he had now transferred the match flame, were like shadows thrown upon a sheet in some sort of shadowgraph game.