QR codes are little black-and-white squares that you might have seen on food packages, movie tickets, restaurant menus, and lots of other places. You take a picture of the code with your smartphone and then your phone takes you to a certain website! But how does your phone know what all those random little dots mean? We asked computer engineer Sam Dickerson to help us find the answer.
Got a question that you just can’t *crack? *Send it to us at BrainsOn.org/contact), and we’ll help *decode *the answer.
