COMPUTER FUNDAMENTALS

Detailed explanation-1: -The earliest vacuum tubes evolved from incandescent light bulbs, containing a filament sealed in an evacuated glass envelope. When hot, the filament releases electrons into the vacuum, a process called thermionic emission, originally known as the Edison effect.

Detailed explanation-2: -Haeff received a patent for the Memory Tube in August 1947, but his idea for a cathode-ray-tube computer memory eventually took a back seat to one developed by British engineer F.C. (“Freddie”) Williams, and later refined by colleague Tom Kilburn, in 1948.