1/60 part of the luminous intensity

25/07/2013 13:52

 That is the platinum freezing point (2042.15K), it is definitely bold 1cm2 area of ​​1/60 part of the luminous intensity of 1 candela. Since World War II, delays, this standard is not executed.

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In 1946, the CIPM in 1933 under the 8th International Conference measurement of the powers conferred by the decision, which:

 

An old candle = 1.005 candela. LED Strip 

 

In 1948, the 9th International Conference measured by using a Latin - candELa (cd) replace new candle, candela meaning "animal oil produced with candles."

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In 1967, the 13th International Conference taking into account the measurement of the wording of this definition still owes tight, decided to candela is defined as:

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