Biography Wilhelm Conrad Röntgen Inventor of X-ray

Wilhelm Conrad Röntgen was a German physicist who was the first recipient of the Nobel Prize in Physics, in 1901, for his invention of X-rays, which marked the beginning of the age of modern physics and revolutionized diagnostic medicine. Röntgen was born March 27, 1845 and died February 10, 1923.Rontgen studied at ETH Zurich and then professor of physics at the University of Strasbourg (1876-79), Giessen (1879-88), Wurzburg (1888-1900), and Munich (1900-20). His research also included works on elasticity, hair pipe motion on fluids, specific gas heat, heat conduction in crystals, heat absorption by gas, and piezoelectricity.
Discovery X-ray
In 1895, while experimenting with electric current flows and partially emptied glass tubes (cathode ray tubes), Rontgen observed that adjacent platinum barium strips released light when the tube was operated. He formulated the theory that when cathode rays (electrons) penetrate the glass walls of tubes, some unknown radiation forms that pass through the room, penetrate chemicals, and cause fluorescence.
Further observations revealed that paper, wood, and aluminum, among other materials, are transparent in this new form of radiation. He found that it affected the photographic plate, and since it did not clearly show some properties of light, such as reflection or refraction, he mistakenly thought that the ray was unrelated to light. In view of the uncertain nature, he calls the phenomenon of X radiation, though also known as X-ray radiation. He took the first X-ray photography, from the inside of the metal object and the bone of his wife's hand.
Hand wife Wilhelm Conrad RöntgenThe first X-ray imagetaken by Röntgenfrom the hands of his wife, Anna BerthaRöntgen
Röntgen or Roentgen (symbolized by R) is a unit of measurement of ionic radiation in air (in the form of X-rays or gamma rays), named after the German physicist Wilhelm Röntgen as the inventor of X-rays. Röntgen is the amount of radiation required to deliver a positive charge and negative of 1 unit of electrostatic electric charge in 1 cm³ of air at standard temperature and pressure. This is equivalent to an attempt to generate about 2.08 × 109 pairs of ions.
In SI system, 1 R = 2.58 × 10-4 C / kg. Dose 500 R in 5 hours is harmful to humans. Under standard atmospheric conditions (air density ~ 1,293 kg / m³) and using an air ionization energy of 36.16 J / C, 1 R ≈ 9,330 mGy, or 1 Gy ≈ 107.2 R.