I'm assuming the maximum number of revolutions per second for a disk is defined as speed c divided by the circumference of the disk, eg a disk with a circumference of half a meter is allowed to rotate twice as fast per second as a disk with a circumference of one meter.(adsbygoogle = window.adsbygoogle || []).push({});

C = circumfrence of the disk

c = speed of light

mrps = maximum revolutions per second (not meters per second)

So is the value of mrps nice and simple : mrps = c / C

Or are there more complicated relativistic affects, for example does the circumference shrink due to length contraction.

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# Rotation at speed c

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