Wilhelm Conrad Röntgen
SSPL/ Getty Images
Stephen Gray
Hulton Archive/ Getty Images
Benjamin Franklin (1706-1790)
Yale University Art Gallery
Pendule de Coulomb
Keystone/ Getty Images
Alessandro Volta
Photos.com/ Thinkstock
Michael Faraday
William Crookes
Joseph Thomson
Keystone/ Hulton Archive/ Getty Images
Champ électrique/champ magnétique
Encyclopædia Universalis France
Paul Dirac
A. Bortzells Tryckeri/ Courtesy of the AIP Emilio Segre Visual Archives
Tubes cathodiques
Topical Press Agency/ Getty Images