Physics
Tall buildings made from electrically conductive materials can send lightning bolts up into the heavens during a thunderstorm, and they generate X-rays at the same time
By Karmela Padavic-Callaghan
The Säntis tower, atop the Säntis Peak in Switzerland
Toma Oregel-Chaumont, Antonio Sunjerga, Pasa Hettiarachchi, et al.
Lightning can shoot upwards from tall towers – and researchers now know that it produces X-rays at the very beginning of its ascent into the clouds.
During a thunderstorm, different parts of a cloud become positively and negatively charged. This separation of charge across the cloud leads to a dramatic electrical discharge that manifests as a column of hot ionised gas and electrons, or plasma, reaching for the ground: a lightning strike.
But when charged-up clouds hover over a tall structure …
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