| 单词 | dichroism |
| 例句 | The authors used a method known as X-ray magnetic circular dichroism to confirm the magnetic ordering experimentally. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z Slates, shales and clays yield biotite hornfelses in which the most conspicuous mineral is black mica, in small scales which under the microscope are transparent and have a dark reddish-brown colour and strong dichroism. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z In the course of this paper he describes some very beautiful experiments with a tincture of Lignum nephriticum, wherein the dichroism of the extract is made apparent. Heroes of Science: Physicists 2012-01-17T03:00:17Z This story is called a "dichronism"; but it might have been called a dichroism, for from one viewpoint it reflects only the clouded colour of earth, and from another a celestial glory. Essays on Modern Novelists 2011-11-22T03:00:10.817Z A very useful means of discriminating between certain stones is found in their dichroism, or, to use a more general term, pleochroism. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z They may be ophitic, though often they are not, and they usually contain olivine, while their augite has distinctly purple shades, and a feeble dichroism. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" However, the amount of dichroism would be less in such a case than in a true emerald of as deep a color. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public This stone is doubly refracting, exhibiting extremely strong dichroism, especially in the blue and the green varieties. The Chemistry, Properties and Tests of Precious Stones They exhibited dichroism and scratched topaz and it was therefore decided that they at least were genuine. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public If there is still no dichroism it is not a ruby. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Almandine garnets also show no dichroism and lack variety of color. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public The marked dichroism of tourmaline will also help detect it. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public They, of course, lack dichroism and are softer than sapphire as well as lighter. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Pink quartz is almost always milky, and shows little dichroism. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Pink spinel is without dichroism, being singly refracting. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Brown zircon, while lacking dichroism, is frequently rich and pleasing in shade, and when well cut is very snappy, the luster being almost adamantine, the dispersion being large, and the refractive index high. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public It had marked dichroism—showing a smoky blue color in one direction and a yellowish white in another. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Although strongly doubly refracting, the hyacinth shows scarcely any dichroism and thus lacks variety of color. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public They are also singly refracting and hence exhibit no dichroism and therefore lack variety of color as compared with true ruby. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public The dichroism of tourmaline is stronger than that of ruby and more obvious to the unaided eye. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public The dichroscope also serves to detect the false character of doublets and paste imitations, as neither shows dichroism. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public The dichroism is feeble too, whereas that of tourmaline is strong. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Not all stones that are doubly refracting exhibit dichroism. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public The zircon, for example, is strongly doubly refracting, but shows hardly any dichroism. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Also, owing to the dichroism of the ruby the red is variable according to the changing position of the stone. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Purple spinels are singly refracting, and lack dichroism, and hence lack variety of color. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public The strong dichroism of the species also aids this contrast. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public White stones of course cannot exhibit it even though doubly refracting, and some colored stones, though strongly doubly refracting, do not exhibit any noticeable dichroism. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public |
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