Olympics swimming question? How do they know the precise time when the swimmer touches the wall?

Question

How do they know the precise time that the swimmer touches the wall?

Is there an elecronic stopper on the wall??

Answer 1

Ha! We asked the same question. Two points! Answer mine for your two points:

http://answers.yahoo.com/question/index;...

Answer 2

lol yeah they have a sensor on the wall :]

Answer 3

They use a couple old guys with an abacus.

Answer 4

yea lol. ive answered like 5 of the same questions just like this! im getting points here and there and everywhere!

Hope this helps!

I AM A PHELPS PHAN!