There is something magical about rainbows that brings out childlike wonder and joy in people. Where else in your life do colorful shapes just appear out of thin air in front of you (and then disappear just as fast)? No wonder people in the past had all kinds of mythical lore associated with rainbows. These days we know that rainbows form when sunlight meets rain, but have you ever wondered why rainbows appear where they do and what determines their shape and position?
