Rotatory dispersion

Japanese: rotatory dispersion(英語表記)rotatorydispersion
Rotatory dispersion

…The optical rotation of an optically active substance varies with the wavelength of the light being measured. This phenomenon is called optical rotatory dispersion (abbreviated as ORD) or rotary dispersion (abbreviated as RD), and can be expressed as a curve with the specific optical rotation [α] or molecular optical rotation [ M ] plotted against the wavelength on the vertical axis. In the region where light absorption can be ignored, the relationship between the specific optical rotation and the wavelength of the incident light λ is often approximated by the Drude monomial [α] = A /(λ 2 - λ 0 2 ), or by the Drude polynomial, which is a superposition of such curves. …

*Some of the terms mentioned in the definition of "rotatory dispersion" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…光学活性物質の旋光度は,測定する光線の波長によって変化する。この現象を旋光分散(ORDと略称)または回転分散rotatory dispersion(RDと略称)といい,縦軸に比旋光度[α]または分子旋光度[M]を波長に対してプロットした曲線として表すことができる。比旋光度と入射光の波長λの関係は,光の吸収が無視できる領域では,多くの場合ドルーデの単項式[α]=A/(λ2-λ02),あるいはこのような曲線の重ね合せであるドルーデの多項式で近似される。…

※「rotatory dispersion」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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