:Hmm. A 3.5 inch disk spinning at 10,000 RPM would be moving about 104MPH at the edge. So there's no danger of exceeding the speed of light. However, there might be some small relativistic effect even at that low speed...? I couldn't find any info on this. More likely, the issue is simply one of material deformation at high speeds. I'd be fascinated if it was the former, though. --D |
The last sentence: "This effect can be noted on computer hard disks" must be wrong. If a hard disk is rotating with 10000 rpm, then the diameter of the disk need to be several hundred kilometer for the velocity of the perimeter to approach the speed of light. Or am I wrong? --css