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  1. Rainbow - Wikipedia

    In a primary rainbow, the arc shows red on the outer part and violet on the inner side. This rainbow is caused by light being refracted when entering a droplet of water, then reflected …

  2. Rainbow | Definition, Formation, & Facts | Britannica

    Dec 9, 2025 · Rainbow, a series of concentric colored arcs that may be seen when light from a distant source—most commonly the Sun—falls upon a collection of water drops—as in rain, …

  3. What Is a Rainbow? - timeanddate.com

    Feb 14, 2025 · All about rainbows. What causes a rainbow, why is it curved? What are the rainbow colors, how does a double rainbow work, and what's at rainbow's end?

  4. What is a Rainbow? How Do Rainbows Form? | Almanac.com

    May 30, 2024 · What is a Rainbow? It takes both the sun and rain to make a rainbow! To put it plainly, rainbows are produced by sunlight entering water droplets, bouncing around each …

  5. How Do Rainbows Form? - National Weather Service

    What is a rainbow? The rainbow is one of the more spectacular light shows observed on earth. The traditional rainbow is sunlight spread out into its spectru m of colors and diverted to the …

  6. Rainbow - Education

    Oct 19, 2023 · A rainbow is an optical illusion —it does not actually exist in a specific spot in the sky. The appearance of a rainbow depends on where you're standing and where the sun (or …

  7. How Rainbows Work - HowStuffWorks

    When white sunlight hits a collection of raindrops at a fairly low angle, you can see the component colors red, orange, yellow, green, blue, indigo and violet -- a rainbow. For simplicity's sake, …

  8. How Rainbows Are Made | Center for Science Education

    You can make your own small rainbow using a garden hose or water sprinkler to form water droplets in the air on a sunny day. Try keeping the Sun behind you and the water droplets in …

  9. What Causes a Rainbow? | NESDIS | National Environmental …

    A rainbow isn’t really a “thing” and it doesn’t exist in a particular “place.” It is an optical phenomenon that appears when sunlight and atmospheric conditions are just right—and the …

  10. Rainbow - Simple English Wikipedia, the free encyclopedia

    A rainbow is created when white light is bent (refracted) while entering a droplet of water, split into separate colours, and reflected back. A rainbow is actually round like a circle.