How Pictures on a Screen Are Made of Pixels

Hey, I'm Byte! Let me show you something amazing. Every picture you see on a screen — a photo, a game character, an emoji — is actually made of tiny colored squares called pixels. The word pixel is short for 'picture element.' Imagine you had a big sheet of graph paper and you colored in each little square a different color. If you stepped back far enough, all those squares would blend together and look like a real picture! That is exactly how your screen works. Your screen has millions of these tiny squares arranged in a huge grid — rows across and columns down. Each pixel can be one color at a time, and together they paint the whole image. Now here is the key idea: the total number of pixels in an image is called its resolution. A high-resolution image has lots of pixels, so it looks smooth and sharp. A low-resolution image has fewer pixels, so it looks blocky and rough. Think about drawing a circle on graph paper with only 4 squares versus 100 squares. With 4 squares it looks blocky, but with 100 squares it looks much rounder and smoother — because each tiny detail gets its own square. When you zoom in really close on a photo on a tablet or phone, you can sometimes start to see those little squares. Try it next time! That is the pixel grid revealing itself.