One one-hundredth of a second

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Quick. Say “one thousand and one.”

That’s supposed to be one second.

So what’s a tenth of a second? There are 17 letters in “one thousand and one.” So try saying 1/10th of that – 1.7 letters -- O and 7/10ths of an n.

There. That’s 1/10th of a second.

Now try dividing that by 10. What is one-tenth of an O and one-tenth of seven-tenths of an n?

That’s really imperceptible, isn’t it? That’s what one one-hundredth of a second is.

And yet, one one-hundredth of a second is perceptible to sophisticated timing devices, the kind used in swimming and track and field races.

And it’s a good thing, too. Can you imagine trying to decide who won the race between Michael Phelps and Milosad Cavic by the naked eye?

Phelps nips CavicPhelps nips Cavic