Think You Know Rainbows? Look Again

Discussion in 'Burke's Bastion' started by Apocales, May 11, 2016.

  1. Apocales 4:35a.m. just one more episode..

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    http://www.scientificamerican.com/article/think-you-know-rainbows-look-again-slide-show1/#slide-1 images there <--

    If sunlight catches a rain shower at just the right moment, shimmering colors arc across the horizon. Although the most common rainbow is a single crescent containing every color from red through violet, if you pay close attention, you will discover that rainbows come in a surprising variety of colors and shapes. And scientists are finally figuring out why. Rainbows can be just red, missing violet and blue or completely white. Multiple bows can be stacked on top of one another like a deck of cards or two can spring from the same pot of gold. Stand on top of a mountain with the sun at your back and a storm up ahead and you might even witness a full 360-degree circle of glittering multicolored light. Rainbows can arise whenever there are water droplets in the air and light to interact with them. Sunlight enters a drop, gets both refracted and reflected, then exits again, splayed out like a fan into a rainbow’s well-known hues. The drop acts much like a prism and a lens; the prism separates the white light into its constituent colors while the lens (the drop’s curvy surface) focuses them into a rainbow’s intense crescents.

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    http://www.scientificamerican.com/article/think-you-know-rainbows-look-again-slide-show1/

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