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pleochroism |
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pleochroism [plē′äk·rə‚wiz·əm] (optics) Phenomenon exhibited by certain transparent crystals in which light viewed through the crystal has different colors when it passes through the crystal in different directions. Also known as polychroism. Pleochroism In some colored transparent crystals, the effect wherein the color is quite different in different directions through the crystals. In such a crystal the absorption of light is different for different polarization directions. In colored transparent tourmaline the effect may be so strong that one polarized component of a light beam is wholly absorbed, and the crystal can be used as a polarizer. See Dichroism How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Iolite has a remarkable feature known as pleochroism, meaning the colour changes when viewed from different directions, usually dark blue-violet, pale-blue, grey or yellow. |
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