Ping pong

Ping-pong, or table tennis, is a sport in which two or four players hit a lightweight, hollow ball back and forth using table tennis rackets. The game takes place on a hard table divided by a net. Except for the initial serve, players must allow a ball played toward them only one bounce on their side of the table and must return it so that it bounces on the opposite side. Points are scored when a player fails to return the ball within the rules. Play is fast and demands quick reactions. A skilled player can impart several varieties of spin to the ball, altering its trajectory and limiting an opponent's options to great advantage.
Ping pong is governed by the worldwide organization International Table Tennis Federation (ITTF), founded in 1926. ITTF currently includes 217 member associations. The ping pong official rules are specified in the ITTF handbook. Since 1988, table tennis has been an Olympic sport.

Equipment

Ball

The international rules specify that the game is played with a light 2.7 gram, 40 mm diameter ball, that the ball shall bounce up 24–26 cm when dropped from a height of 30.5 cm on to a standard steel block thereby having a coefficient of restitution of 0.89 to 0.92.

Table

The table is 2.74 m long, 1.52 m  wide, and 76 cm high with a Masonite or similarly manufactured timber, layered with a smooth, low-friction coating. The table or playing surface is divided into two halves by a 15.25 cm high net. An ITTF approved table surface must be in a green or blue color. Concrete tables with a steel net are sometimes available in public parks.

Racket

Players are equipped with a laminated wooden racket covered with rubber on one or two sides depending on the grip of the player.

he wooden portion of the racket, often referred to as the "blade", commonly features anywhere between one and seven plies of wood, though cork, glass fiber, carbon fiber, aluminum fiber, and Kevlar are sometimes used.