Photometry

Japanese: photometry
Photometry

…It is the measurement of light, but technically it means measuring light as a psychophysical quantity. In English, therefore, the special word photometry is used. In other words, it is the measurement of how effective light is for the human eye, and naturally, only light in the visible range is measured. …

*Some of the terminology that mentions "photometry" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…光を測定することであるが,専門的には心理物理量としての光を測定することをいう。英語では,したがってphotometryという特別の単語を使っている。つまり,人間の目にとってどれだけ効果のある光かを測定することであり,当然ながら可視域の光だけが測定の対象になる。…

※「photometry」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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