CrazyEngineers Forum - Mechanical & Civil Engineering |
| Posted: 04 May 2011 11:27 PM PDT 1}When you see a rotating fan, at the start it seems like rotating in opposite direction. Why does it look so? 2}This also happens when the fan is rotating at a very high speed. In the first case, the illusion stays for few seconds. But in the second case, it remains as long as the fan is rotating. |
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