【The Geometry of GOLF】 8. The Geometry of putting (2) Effect of spin on the green
The D Plane theory was proposed by American physicist Theodore P. Jorgensen and the relationship between ball spin and curving was formulated. Until then, it was believed that the ball had a lateral spin as well as a backspin, which was curving the ball, but in this theory the spin of the ball is only the backspin, It was correct to understand that the ball would curve due to the inclination of the spin. However, this theory called D Plane is applied only when the ball is flying in the air, and it cannot be applied at all when the ball is rolling on the green. In the putt, when the ball is hit out to in and slice rotation is applied, the ball hooks. This is common knowledge in billiards. In fact, in billiards, there is a technique to curve the ball by lateral rotation. When curving the ball to the left, poke the left side of the ball with a cue and apply the slice rotation that is called in golf. If you may mistake a short putt to left, it may be because the ball hooked because the ball was hit out to in and the slice spin was applied.