 It will, but for the testing stage, it doesn't matter how it travels, just that it does, and that it seems like an unbroken image at the other end, even though it's not. Why does it seem in a way it's not? Because of your eye. My eye? The human eye retains an image on its retina for about less than a tenth of a second. That's called persistence of vision. See, television doesn't have to show a continuous picture. It replaces each and every line that makes up the image in less than that fraction of time.