Who invented the first vacuum tube?

Lee de Forest
Ferdinand Braun
John Fleming
Vladimir Zworykin
In 1904, he invented the two-electrode vacuum-tube rectifier, which he called the oscillation valve. This invention is often considered to have been the beginning of electronics. Fleming's diode was used in radio receivers and radars for many decades afterwards, until it was superseded by solid state electronic technology more than 50 years later.
Ninjai
0
Correct this question
0
Very interesting!
reach: rather globalinventorstechnology
Inventors quizTechnology quiz
  You will play as

Answers by country

Lee de Forest
Ferdinand Braun
John Fleming
Vladimir Zworykin
answers
flagAustralia
0%
15%
78%
5%
19
flagAustria
5%
21%
63%
10%
19
flagthe United States
13%
15%
55%
15%
45
flagGreece
7%
7%
46%
38%
13
flagIndia
0%
20%
40%
40%
10
flagPoland
13%
24%
36%
24%
1094
flagthe United Kingdom
20%
20%
25%
35%
20
flagGermany
9%
57%
13%
19%
73