What technology characterized the electronic solutions being pursued simultaneously by inventors like Farnsworth and Zworykin?

Answer

The cathode-ray tube (CRT)

While Baird worked mechanically, other inventors pursued electronic television utilizing the Cathode Ray Tube (CRT), which used an electron beam allowing for instantaneous scanning across the screen.

What technology characterized the electronic solutions being pursued simultaneously by inventors like Farnsworth and Zworykin?
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