Ernst Ruhmer (nonfiction)

Ruhmer listening at one station to his "photo-electric" optical telephone system (1905).

Ernst Walter Ruhmer (April 15, 1878—April 8, 1913) was a German physicist. He was best known for investigating practical applications making use of the light-sensitivity properties of selenium, which he employed in developing wireless telephony using line-of-sight optical transmissions, sound-on-film audio recording, and television transmissions over wires.

Fiction cross-reference

• Crimes against physical constants
• Gnomon algorithm
• Mathematics

Nonfiction cross-reference

• Physicist (nonfiction)

External links:

• Ernst Ruhmer @ Wikipedia