Roentgen (unit)
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The roentgen or röntgen is a legacy unit of measurement for the exposure of X-rays and gamma rays, and is defined as the electric charge freed by such radiation in a specified volume of air divided by
Display of quartz fiber dosimeter, in units of roentgen.
Wilhelm Röntgen
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Wilhelm Conrad Röntgen was a German experimental physicist who produced and detected electromagnetic radiation in a wavelength range known as X-rays. In 1901, Röntgen became the first recipient of the
Roentgen (unit)
…protection, as it was then the most easily replicated method of measuring air ionization by using ion chambers. It is named after the German physicist Wilhelm Röntgen, who discovered X-rays and was awarded the first Nobel Prize in Physics for the discovery. However, although this was a major step forward in standardising…
Röntgen in 1900
The house in Remscheid-Lennep, Germany, where Röntgen was born.
Grave of Wilhelm Röntgen (and relatives) in Alter Friedhof in Giessen.
X-ray by Röntgen of Albert von Kölliker's hand.