Also known as candlelight. A unit of luminous intensity. Used until the International Committee for Weights and Measures adopted the candela in 1948. (1) International candle. A unit established in 1908 by an agreement between the national laboratories of the UK, the US and France, and maintained for incandescent lamps thereafter. Equivalent to 1.0067 candela. (2) Candle. One candle is one-tenth of the horizontal luminous intensity of a Harcourt 10-candle pentane lamp burning under certain conditions. Used in the UK and Japan. Equivalent to 1.0 international candle. (3) Höfner candle. The horizontal luminous intensity of a Höfner lamp burning under certain conditions is 1 Höfner candle. Used in Germany. Equivalent to 0.9 international candle. → Related item Luminous intensity Source : Heibonsha Encyclopedia About MyPedia Information |
燭光とも。光度の単位。1948年国際度量衡委員会がカンデラを採用するまで使用された。(1)国際燭。1908年英米仏3国の国立実験所間の協定で定められ,以後白熱電灯で維持された単位。1.0067カンデラに相当。(2)燭。一定の条件下で燃焼するハーコート10燭ペンタン灯の水平光度の10分の1を1燭とする。英国,日本で使用。1.0国際燭に相当。(3)ヘフナー燭。一定の条件下で燃焼するヘフナー灯の水平光度が1ヘフナー燭。ドイツで使用。0.9国際燭に相当。 →関連項目光度 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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