[ 2007-06-01 12:31 ]
So that they look cute? NO!
Because the dimples maximize the distance golf balls travel. Dimpled balls
travel up to four times farther than smooth-surfaced golf balls.
In the early days of golf, smooth-surfaced balls were used until golfers
discovered that old, bumpy balls traveled longer distances. The science of
aerodynamics helps explain the dimpled
phenomenon. The dimples reduce the drag on a golf ball by redirecting more air
pressure behind the golf ball rather than in front of it. The higher levels of
pressure behind the golf balls force them to go far distances.
The dimples change the levels of pressure by bringing the main air stream
very close to the surface of the golf ball. The dimples, or "turbulators,"
increase the turbulence in the layer of air located next to the surface of the
ball. This high-speed air stream near the ball increases the amount of pressure
behind the ball-thereby forcing the ball to travel farther.
（来源：coolquiz.com 英语点津 Annabel 编辑）