Regarding cathode rays in a discharge tube, which statement is NOT correct?

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1. Regarding cathode rays in a discharge tube, which statement is NOT correct?

They originate at the cathode and travel toward the anode

Television picture tubes are essentially cathode ray tubes

Cathode rays themselves are not directly visible

Their basic characteristics depend on the specific gas present in the tube

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Cathode rays are identical regardless of the gas used or the electrode material — this universality was crucial historical evidence that electrons are a fundamental particle common to all matter.