The concave lens is the one on the right. The image is: virtual erect (the same way up as the object) diminished (smaller than the object) nearer to the lens than the object and located at a distance from the lens less than the focal length.. It's virtual, upright and reduced.
Snooker tables are considerably larger than pool or billiard versions, their height is somewhat reduced and the pockets are smaller. Because this cue game utilizes higher number of smaller balls, these differences come as natural. The standard dimensions of a snooker table utilized in Europe are 12Ã6 feet.
The playing surface of the billiard table is covered in a fabric made from worsted wool (100 percent) and is referred to as baize, rather than felt like in pool and snooker. From one rail to the other, the surface of play on the billiard table is approximately 112 inches by 56 inches.