X-Ray Photography

(1896)
X-Ray of the Hand of Anna Berthe Röntgen

As photography became more widely available, scientists discovered new ways to use photos to advance their work.  One example is the X-Ray, which was first discovered in 1896 by Wilhelm Conrad Röntgen (1845-1923).

In recognition of his discovery, Röntgen received the first Nobel Prize in Physics in 1901.

Image Credit
  Röntgen, Wilhelm C. X-Ray of the Hand of Anna Berthe Röntgen – 1895. Wikimedia Commons. Accessed: 22 July 2010.
References
[1] BBC - h2g2 - The Camera Obscura. bbc.co.uk. 23 Jun 2010
[2] Wilhelm Conrad Röntgen: Biography. Nobelprize.org. 22 Jun 2010