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This is a moving image of a pole on the left of image moving up and down. Coming out of the top of the pole are dots, which look like a string of beads. They are going along in a wave-like shape. there is a static yellow dashed line in the background. to the right of the image there is a graphic of scenery, the sky, cloud and sunshine can be seen, next to grass and mountains.

 3.1 Transverse waves