Cathode Ray Tube
| Formula / Notation | ½mv² = eV |
|---|---|
| Also Known As | CRT, Braun tube, electron beam tube, cathode ray oscilloscope tube |
What is Cathode Ray Tube?
A cathode ray tube (CRT) is an evacuated glass tube in which electrons (cathode rays) emitted from a heated cathode are accelerated by an electric field and deflected by electric or magnetic fields. J.J. Thomson used CRTs to discover the electron in 1897. CRTs were used in oscilloscopes, early television sets, and computer monitors.
Formula & Notation
Other Names / Synonyms: CRT, Braun tube, electron beam tube, cathode ray oscilloscope tube
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A cathode ray tube (CRT) is an evacuated glass tube in which electrons (cathode rays) emitted from a heated cathode are accelerated by an electric field and deflected by electric or magnetic fields. J.J. Thomson used CRTs to discover the electron in 1897. CRTs were used in oscilloscopes, early television sets, and computer monitors.
CRTs were used as display devices in televisions and computer monitors until replaced by flat-panel displays. Cathode ray tubes remain important in oscilloscopes for waveform measurement. The CRT principle is the basis of electron microscopes and X-ray tubes.
CRTs operate at high voltages (10–30 kV) and contain lead glass to absorb X-rays produced by electron beam impact. Implosion hazard if the vacuum envelope is broken. Disposal requires handling as hazardous electronic waste due to lead content.
The formula or notation for Cathode Ray Tube is: ½mv² = eV