″Playing a record? I’ll show you something interesting… Compare a point on the label with a point on the record’s outer edge.
They both make a complete circle in the same amount of time. Right?
But the point on the record’s edge has to make a bigger circle in the same time. So it goes faster. you See, two points on one disc move at two speeds eventhough they both make the same revolutions per minute!″
D’après la bande dessinée de Bill Watterson: Calvin & Hobbes (Extrait).
Patrick BETAILLE, avril 2021