Can there be more than one rainbow in the sky at any given time? (other than the secondary rainbow that is above or below the vivid rainbow but upside down)
by 
Renee
ANSWERS: 2
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There are a variety of rainbow effects that can seen under some circumstances. The wikipedia page on rainbows has some nice descriptions of these; in particular this section is interesting: http://en.wikipedia.org/wiki/Rainbow#Variations
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Although rainbows often have two bows, and rarely additional (supernumerary) bows, they are all derived from the same optical setup that produces the main rainbow. Because it's an optical illusion requiring the sun to be behind the viewer, and because it occurs at a specific angle with respect to the sun due to refraction from water droplets, all visible rainbows will appear to share the same center point in common. So the short answer is no.
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