Cathode rays come from the cathode, because the cathode is charged negatively. So those rays strike and ionize the gas sample inside the container. The electrons that were ejected from gas ionization travel to the anode. These rays are electrons that are actually produced from the gas ionization inside the tube.

Where do anode rays originate from?

These rays are believed to be produced as a result of the knock out of the electrons from the gaseous atoms by the bombardment of high speed electrons of the cathode rays on them. Thus(anode rays are not emitted from the anode but are produced in the space between the anode and the cathode.

What is the origin of cathode rays *?

Cathode rays are so named because they are emitted by the negative electrode, or cathode, in a vacuum tube. ... The positive ions were accelerated by the electric field toward the cathode, and when they collided with it they knocked electrons out of its surface; these were the cathode rays.