BIPM - Resolution 5 of the 13th CGPM

Resolution 5 of the 13th CGPM (1967/68)

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Other Resolutions
of the 13th CGPM

Summary

Participation at the General Conference

22nd CGPM (2003): Presentations by CC Presidents

23rd CGPM (2007): Presentations by CC Presidents

Proceedings of the CGPM

Resolutions of the CGPM

Chain of responsibility

The benefits of participating in the BIPM

Procedure for a State to join the BIPM

Procedure for a State or Economy to become an Associate of the General Conference

Evolving Needs for Metrology in Trade, Industry and Society, and the Role of the BIPM

National and International Needs Relating to Metrology

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	SI unit of luminous intensity (candela)*		(4)	(6)

The 13th Conférence Générale des Poids et Mesures (CGPM),

considering

the definition of the unit of luminous intensity ratified by the 9th CGPM (1948) and contained in the "Resolution concerning the change of photometric units" adopted by the Comité International des Poids et Mesures in 1946 (PV, 20, 119) in virtue of the powers conferred by the 8th CGPM (1933),

that this definition fixes satisfactorily the unit of luminous intensity, but that its wording may be open to criticism,

decides to express the definition of the candela as follows:
"The candela is the luminous intensity, in the perpendicular direction, of a surface of 1/600 000 square metre of a black body at the temperature of freezing platinum under a pressure of 101 325 newtons per square metre."

Reference:

Comptes Rendus de la 13^e CGPM (1967/68), 1969, 104

Metrologia, 1968, 4(1), 43-44

Note:

This definition was abrogated by the 16th CGPM in 1979 (Resolution 3).