Do the olympic swimming pools have sensored walls?

Question

i always wonder how they know who really wins when the races are so close. is there some sort of sensor on the pools ? so when they touch they know who really touched it first?

Answer 1

Yes they have sensor pads on the walls for about 30 years now.  

Answer 2

they place touch pad sensors on the wall which immediately stops the time when you touch them.

Answer 3

yes and when you touch it the time stops

Answer 4

the sensors are on the walls, that was how michael phelps' win by 1 hundredth of a second was determined!

Answer 5

My friend, the pools have touch pads at each ends of the pool. That way the judges will know who reached first.

Everything now a days is done electronically.

Good luck