katodisädeputkiin
Katodisädeputki, or Cathode Ray Tube (CRT) in English, is a vacuum tube containing one or more electron guns that emit a beam of electrons. This beam is then deflected by electric or magnetic fields, causing it to scan across a phosphorescent screen. When the electrons strike the screen, they excite the phosphors, causing them to emit light. The intensity and position of the beam are controlled to create images. CRTs were widely used in older televisions, computer monitors, and oscilloscopes before being largely replaced by flat-panel display technologies like LCD and OLED.
The operation of a CRT involves several key components. The electron gun produces a focused beam of