Rainbow - The primary rainbow forms between about 40° and...

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AINBOWS ainab Saba oll no: 373
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What is a Rainbow? A rainbow is merely a large band of parallel  stripes, blended at the rims, which displays the  full spectrum of colors that make up the sun's  white light. 
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How a Rainbow is formed? Sunlight is composed of light of varying  wavelengths. Short wavelength light appears  blue, violet and indigo, and long wavelength light  appears red, orange and yellow. When sunlight  enters a raindrop in the air, the light splits into a  multitude of colors. This light then reflects off  the back of the raindrop and re-emerges in the  direction in which the light first entered. The  light emerging from many raindrops creates a  rainbow.
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Types Of Rainbows Two Types: o Primary Rainbow o Secondary Rainbow
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Primary Rainbow
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Unformatted text preview: The primary rainbow forms between about 40° and 42° from the anti-solar point. The light path involves refraction and a single reflection inside the water droplet. If the drops are large, 1 millimeter or more in diameter, red, green, and violet are bright but there is little blue. Such large droplets are suggested by the rainbow at right. Secondary Rainbow The secondary rainbow is about 10° further out from the anti-solar point than the primary rainbow, is about twice as wide, and has its colors reversed. The secondary rainbow involves two reflections inside the falling droplets. http://www.youtube.com/watch?v=g1UHAPQGkKk http://www.youtube.com/watch?v=rQukmSPctks Thankyou!...
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This note was uploaded on 01/17/2012 for the course MASS COMMU 107 taught by Professor Masror during the Spring '11 term at College of E&ME, NUST.

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Rainbow - The primary rainbow forms between about 40° and...

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