Science · 6 views
Sound-levitated particles reveal how static charge builds up
When two objects touch and then separate, they can swap tiny amounts of electric charge, even if they are made from exactly the same material.
Summary
When two objects touch and then separate, they can swap tiny amounts of electric charge, even if they are made from exactly the same material. This 'triboelectric effect' is the source of everyday static electricity, but it is still poorly understood in large samples of powder, where vast numbers of particles are constantly colliding with each other.
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