What are cathode rays? Write down their characteristics.

(N/A) In an evacuated cathode ray discharge tube,when a sufficiently high voltage is applied across the electrodes,current starts flowing through a stream of particles moving in the tube from the negative electrode (cathode) to the positive electrode (anode). These were called cathode rays or cathode ray particles.
Characteristics of cathode rays $OR$ Results of cathode ray discharge tube experiments:
$(i)$ The cathode rays start from the cathode and move towards the anode.
$(ii)$ These rays themselves are not visible,but their behaviour can be observed with the help of certain kinds of materials (fluorescent or phosphorescent) which glow when hit by them.
$(iii)$ In the absence of an electrical or magnetic field,these rays travel in straight lines.
$(iv)$ In the presence of an electrical or magnetic field,the behaviour of cathode rays is similar to that expected from negatively charged particles,suggesting that the cathode rays consist of negatively charged particles,called electrons.
$(v)$ The characteristics of cathode rays (electrons) do not depend upon the material of the electrodes and the nature of the gas present in the cathode ray tube. Thus,we can conclude that electrons are the basic constituent of all atoms.