Handout
Wikimedia

Wikipedia: Lee De Forest

For Students 9th - 10th
This Wikipedia encyclopedia article on Lee de Forest discusses his life and his invention of the triode (or audion), which laid the foundation for radio.
Handout
Massachusetts Institute of Technology

Mit: Invention of the Week: Lee De Forest

For Students 3rd - 8th
This website provides information on the life and inventions of Lee DeForest, the man who invented the audion tube, which made commercial radio broadcasting practical.
Unit Plan
National High Magnetic Field Laboratory

Magnet Academy: Audion

For Students 9th - 10th
In 1906, American physicist Lee De Forest invented the Audion (or triode), building on John Fleming's discovery of the diode just a few years before.
Handout
National High Magnetic Field Laboratory

Magnet Academy: Lee De Forest

For Students 9th - 10th
American inventor Lee De Forest was a pioneer of radio and motion pictures. He received more than 300 patents over the course of his lifetime, the most important of which was for a three-electrode vacuum tube, or triode, that he called...