Pleochroism

Japanese: pleochroism
Pleochroism

...Therefore, in crystals where this phenomenon is prominent, when white light is projected onto a thin slice or crystal plate and observed, the color may differ between the observation of one of the two vibrations (linearly polarized light) in the crystal and the observation of the other vibration. This is called pleochroism. In optically isotropic bodies, even if there is selective absorption and color, pleochroism is not observed because no polarization occurs in the crystal. ...

*Some of the terminology explanations that mention "pleochroism" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…したがって,この現象の著しい結晶では,その薄片あるいは結晶板に白色光を投射して観察するとき,結晶中における二つの振動(直線偏光)のうち一方の振動だけを取り出して観察した場合と,他方の振動だけを観察した場合とで,色が異なることがある。このことを多色性pleochroismという。光学的等方体では,たとえ選択吸収があって色がついていても,結晶中では偏光を生じないから多色性は認められない。…

※「pleochroism」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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