When looked at macroscopically, matter appears continuous. On the submicroscopic level, however, we find that matter is made of extremely small particles, such as atoms or molecules. Similarly, a TV screen looked at from a distance appears as a smooth continuous flow of images. Up close, however, we see this is an illusion. What really exists are a series of tiny dots (pixels) that change color in a coordinated way to produce images. Use a magnifying glass to examine closely the screen of a computer monitor or television set.
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