Wilhelm Röntgen was a German physicist born in 1845 who discovered X-rays in 1895 while experimenting with cathode ray tubes in a dark laboratory. On November 8, 1895, he noticed a fluorescent screen lighting up in a nearby drawer, even though it was not attached to the discharge tube. He concluded he had discovered a new kind of radiation which he named X-rays. In 1901, Röntgen received the first Nobel Prize in Physics for his discovery of X-rays. He refused to patent the discovery and donated the prize money to his university.

1. LOGO
Wilhelm Rӧentgen / Rӧntgen
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2. BACKGROUND
 March 27, 1845
 Germany
 In school he was not very successful
 Poly-Technical Institute in Zurich, Switzerland
 Mechanical Engineering
 Berthe Anna Ludwig (wife)
 Dr. August Kuntz (encouragement)
 Institute of Physics at the Wuerzburg University

3. Discovery of X-Ray Beams
 Wilhelm Roentgen was already working on
the effects of cathode rays during 1895,
before he actually discovered X-rays.
 November 8, 1895 inside a laboratory
 Totally dark room
 Well-covered discharge tube
 Barium platinocyanide

4. Cont
 Photographic plate to capture the image of
various objects of random thickness placed in
the path of the rays
 "roentgenogram“
 He declared that X-ray beams are produced by
the impact of cathode rays on material objects
 Scientists in many countries started to
experiment with these new rays, and progressive
doctors very quickly used them as a diagnostic
tool.

5. X-radiation (x-ray)
 Extremely short wavelength and high frequency
with wavelengths ranging from about 10−8 to
10−12 meter and corresponding frequencies
from about 1016 to 1020 hertz (Hz).

6. The Nobel Prize
In 1900 Professor Roentgen
accepted a position at the
University of Munich.
In 1901, Roentgen received
the first ever Nobel Prize in
Physics.

7. Later
 Röntgen refused to patent his discovery
and gave the money that came with the
Nobel Prize to his university.
 Röntgen died at Munich on February 10,
1923, from carcinoma of the intestine.
 In 2004, an element was named after him.
 Atomic Number: 111
 Standard Atomic Mass: 272 u

8. REFERENCES
 Explorable.com. (2010). Wilhelm Conrad Roentgen and
the Discovery of X-Ray Beams. Retrieved September 6,
2014, from https://explorable.com/wilhelm-conrad-roentgen
 "Wilhelm Conrad Röntgen -
Biographical". Nobelprize.org. Nobel Media AB 2014.
Web. 7 Sep 2014.
http://www.nobelprize.org/nobel_prizes/physics/laureates
/1901/rontgen-bio.html
 "Wilhelm Roentgen". HistoryLearningSite.co.uk. 2011.
Web

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