why anode rays are called \'canal\' rays ?

1.	why anode rays are called \'canal\' rays ?
Answer» Anode Rays are called the canal rays as the cathode used is porforated and the anode rays pass through the holes or canals of The cathode opposite to the anode. The anode rays produced at the anode of the discharge tube are called canal rays because they pass through the holes of the cathode.

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