Radphot

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Radphot

an archaic unit of luminous exitance equal to 1 lumen per sq cm (1m/cm²). The name “radphot” was derived from phot, a unit of illuminance. It was proposed by the French physicist A. Blondel and included in 1928 in the recommendations of the International Commission on Illumination (CIE). In 1951 the CIE recommended that the unit for luminous exitance should be 1m/m².

In the USSR radphot was used after 1932 (Sectorial Standard of the All-Union Committee on Standardization 4891). In 1948 the Statute on Photometric Units defined radphot as the unit of luminous exitance equal to 10,000 rlx (radlux). The radphot is abbreviated rph. The unit was not included in the All-Union State Standard 7932–56, Photometric Units.

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No references found			Radnóti, Miklós Rado, Sandor Radó, Sándor Radojcic, Nikola Radoje Domanovic Radom Radom Constitution of 1505 radome Radomsko Radomyshl Radon radon breath analysis Radon measure Radon theorem Radon transform radon-220 radon-222 Radonezh Radonic, Jovan Radoshkovichi Radoslavov, Vasil Radovan Dragovic Radovan Lukavsky Radovan Lukavský Radovan Zogovic Radphot Radstockian Radtsig, Aleksandr Radtsig, Aleksandr Aleksandrovich Radtsig, Sergei Radtsig, Sergei Ivanovich Radu Beligan Radu Boureanu Radu the Great Radula Radula Gajda Radun Radunitsa Radus-Zenkovich, Viktor Radus-Zenkovich, Viktor Alekseevich Radushnoe Radviliškis Radviliskis Radzhab Islambekov Radzhab Kaplanovich Islambekov Radzievskii, Aleksei Radzievskii, Aleksei Ivanovich radzimir Radzin, Elza Radzin, Elza Ianovna Radzionkow			Radon Progeny Integrated Sampling radon seed radon seed radon seed radon seed Radon Testing Corporation of America Radon theorem Radon transform Radon transform Radon Transformation Radon's theorem radon-220 radon-222 radon-222 Radon-Resistant New Construction Radon-Thoron-Daughter-Monitor Radon-Wigner Transform Radonezh Radonic, Jovan Radoshkovichi Radoslavov, Vasil RADOT Radoub Radovan Dragovic Radovan Lukavsky Radovan Lukavský Radovan Zogovic RADP RADPC Radphot RADPRO RADQ RADR RADR-Cities RADRECON RADREL RADREM RADRON RADRU/C Rads Rads Rads Rads Rads Per Hour RADSAMP RADSCAT RADSIM RADSL RADSL RADSL RADSS RADSTA Radstädter Tauern Radstockian RADSTORE RADT RADTAG Radtke Tile and Marble, Inc.

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