REBOUND OF A BALL ON THE BANDS THEORY OF A REBOUND BALL BILLIARDS. The big question that arises every beginner is how to use the tapes to hit the target ball. It’s just math, but not complicated! THEORY The diagram below shows the bounce on the tapes billiards explaining the angles of incidence and reflection.The angle BMM ‘(incidence angle) is equal to the angle of relection M’MQ other hand the BMQ angles and MQM’ are additional (their sum is 180 °)We can therefore deduce that the lines (WB) and (QM ‘) are parallel. This property (and is clearly seen on the animation) can be very useful to seek the leap bounce on a tape. This is particularly true for French billiards where this type of rebound is of primary importance, but is also widely used in snooker or English pool. Note that if parallelism exists only because the angle is right. This is due, will be understood, property of equal alternate interior angles, alternate-external and correspondents. And therefore can not be verified on a pool table with four perpendicular sides LAW OF REFLECTION. The light beam is incident said before meeting the reflecting surface, it is said after thought. The meeting point of the incident beam and the reflecting surface is called the point of incidence. The line orthogonal to the reflecting surface at the point of incidence is called the normal (to the reflecting surface). The plane containing the incident ray and the normal to the reflective surface at the point of incidence is said plane of incidence. Oriented angle θ1 made between the normal at the point of incidence and the incident ray is said angle of incidence. Oriented angle θ2 made between the normal at the point of incidence and the reflected beam is said angle of reflection. HOW DOES IT WORK? Suppose A ball must reach the point B. Method: Imagine a band that passes through A and B He must choose the point E of the band as the AEF thinking is correct (incidence = reflection). Simple to say or explain, probably harder to do: remain dedicated to training!