what is the difference between cathode rays and x-rays ?
Cathode rays are a beam of electrons emerging from the cathode (the negative terminal) within an electron tube. Electrons are actual particles with mass and charge.
X-rays are not charged particles but massless electromagnetic radiation. X-rays can be produced by the deceleration of electrons, by atomic electrons quantum jumping to a lower energy state, from atomic nuclei via radioactivity, and other processes.