Question

what is cathode ray?

Answer 1

a beam of electrons emitted from the cathode of a high-vacuum tube.



Uses of cathode ray


Essentially cathode rays are a stream of electrons passing through a vacuum from a negative electrode (cathode) to a positive electrode (anode).

Cathode rays are electrons produced in an “electron gun” which consists of a heated metal “cathode” in a vacuum tube. This cathode is connected to a high negative electrical potential (voltage). An anode several cm away is held at a very high positive potential (voltage). The positive charge on the anode attracts the electrons from the cathode and accelerates them towards the anode giving them kinetic energy in the process. Most electrons (cathode rays) hit the anode and are drawn off as an electrical current but some pass through a small hole and shoot past the electrode forming a beam of electrons (cathode rays) which can be used in displays (such as the old CRT TVs, monitors and oscilloscopes) or to produce x-rays.

Answer 2

Cathode ray is a stream of electrons.