N-ray

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

N-rays (or N rays) were a hypothesized form of radiation described by French physicist Prosper-René Blondlot in 1903. They were initially confirmed by others, but subsequently found to be illusory.

Excerpt from the Wikipedia article “N-ray”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Prosper-René Blondlot (1849-1930), Public domain, via Wikimedia Commons.