Help me understand this effect

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Help me understand this effect

@Wogi to

Ask ScienceEnglish • 10 months ago

This is an abrasive disk, rotating at 1500 rpm. When I shine my flashlight at it, it carries the glow with it, approximately halfway around the disk. What am I seeing happen here?

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@9point6
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10 months ago
I saw “iron”, “aluminium” and “oxide” and I briefly assumed you were trolling until I looked again to check which one was the oxide.

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