Ditemukan 1 dokumen yang sesuai dengan query
Adam, Mike, author
The life-long inventor, Lee de Forest invented the three-element vacuum tube used between 1906 and 1916 as a detector, amplifier, and oscillator of radio waves. Beginning in 1918 he began to develop a light valve, a device for writing and reading sound using light patterns. While he received many patents...
New York : Springer, 2012
e20425849
eBooks Universitas Indonesia Library
