Cathode rays are

Cathode rays travel

Cathode rays were discovered by

Cathode rays have:

Cathode rays were discovered by

Cathode rays have

(I) Cathode rays produce heat, when allowed to fall on matter. (II) Cathode rays produce X-ray, when allowed to fall on material of high atomic weight. (III) Cathode rays are positively charged particles (IV) Cathode rays ionize the gas.