Standing Waves:

Begin shaking the rope rhythmically once again. Set up waves all along its length. Send sine waves down the rope. At some shaking frequencies, the impulses replicate back and onward among your hand and the anchor therefore their effects add altogether. Each point on the rope experiences a force upward, then downward, and then up again, and then down again. The reflected impulses reinforce; the sideways motion of the rope is exaggerate. Standing waves emerge.

The standing waves obtain their name from the fact that they do not, in themselves, travel anywhere. Though they can obtain tremendous power. Some points all along the rope move up and down a lot, few moves up and down a little, and others stand totally still, only rotating slightly as the rest of the rope wags. The points where the rope moves up & down the farthest are termed as loops; the points where the rope does not move are termed as nodes. There are forever two loops and two nodes in a whole standing-wave cycle. They are all uniformly spaced from one another.