Cathode rays are produced when high voltage is applied across electrodes in an evacuated glass tube

the verdict

COMMON KNOWLEDGE

Legacy classification; evidence review pending

Recorded sources

no sources on either side

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that cathode rays are produced when high voltage is applied across electrodes in an evacuated glass tube?

The claim describes a fundamental definition of how cathode rays are produced in gas discharge tubes, representing a basic piece of historical physics common knowledge that does not require citation.

Verdict: COMMON KNOWLEDGE · 0 sources for, 0 against · Last checked 5 Aug 2026

The analysis

The claim is a standard, trivially true statement of historical physics regarding the production of cathode rays via gas discharge tubes. None of the retrieved papers discuss cathode rays in Crookes tubes; instead, they cover unrelated modern topics such as hydrology, superhydrophobic coatings, solar water heaters, and battery cathodes. Because the statement is common knowledge, no papers are attached.

What does the evidence say?

Receipt History

first checked05 Aug 2026

judged → COMMON KNOWLEDGE · 9505 Aug 2026

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