From: hnwXZjNbXb
On: 4/11/13
A rainbow is a large band of anjacedt stripes of various colors that forms in an arc when the sun shines on water suspended in the atmosphere It displays the spectrum of colors, with red on the outside, then heading inward through orange, yellow, green, blue and indigo to violet.These colors appear through the prismatic quality of water (usually raindrops), which breaks up and refracts the sunlight at an array of angles, depending on its intensity The angle of the most intense light is between 40 and 42 degrees, which is why a rainbow takes the form of an arc.For a rainbow to be visible, the observer must be in a position between the suspended water in front and the sun behind, which explains why rainbows are seen most often in mornings or afternoons, when the sun is low in the sky If the sun is too high, it won’t be behind the observer and no rainbow will be seen Because of the necessary alignment of the sun and the rain, a rainbow can be seen from only one side.A rainbow doesn’t actu
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