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Answer: German physicist E. Goldstein performed an experiment with 2 electrodes and a glass tube filled with hydrogen gas. He kept the pressure of the gas very low and ended up in discovering canal rays (in other words, anode rays)
The main perception behind this experiment was, if the only electron from Hydrogen atom is removed, only one proton is left. At the 2 ends of a discharge tube filled with Hydrogen gas in very low pressure, he implemented 2 electrodes (an anode in one end and a cathode in the other). Due to electric attraction and repulsion, a proton (positively charged) is attracted towards cathode and emits a ray due to its higher energy.
This ray emitted due to transport of positively charged particles (proton) from anode to cathode is called canal ray or anode ray.
