Radiation measurements. Researcher using a parallel plate free-air ionisation chamber to determine X-ray intensities in roentgens (the unit used to me
Radiation measurements. Researcher using a parallel plate free-air ionisation chamber to determine X-ray intensities in roentgens (the unit used to measure radioactivity and the strength of radiation). Photographed in 1948, in the Physics Division of the National Physical Laboratory, Teddington, UK.
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Photo credit: © NATIONAL PHYSICAL LABORATORY © CROWN COPYRIGHT/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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