
Rainbows are mesmerizing visual masterpieces that paint the sky with colors. They form when sunlight shines through rain, mist, fog or the spray of waterfalls. Rainbows appear to be physical phenomena, but they are actually optical illusions, revealing the hidden world of light and color.
Sunlight is white light, a blend of colors. When this light encounters a raindrop, the droplet acts like a prism to bend and split light into its component colors: red, orange, yellow, green, blue, indigo, violet – known as ROYGBIV. Rainbow colors always appear in this order. Amazingly, it takes millions of sunrays to make a single rainbow. And consider that large raindrops create brighter rainbows whereas small drops make paler colors.
If you're lucky, you might witness a double rainbow when light reflects twice inside raindrops. Red is at the top of the brighter rainbow and at the bottom of the paler one. The moonbow is another extraordinary display that appears on clear nights opposite the moon as sunlight reflects off the moon’s surface. Rainbows are fleeting marvels, reminding us how beautiful the weather can be when light and water join up for a show.