Answers

2014-04-06T13:46:53+05:30
Because  when white light in sky splits it break down into its seven constituents.
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2014-04-06T14:36:46+05:30
Bcoz when d rays from sunlight passes thru d raindrops the raindrop act as refractv medium n with certain angel the light rays get dispersed and form color spectrum . thus with diffrnt angle diffrnt color formd... hence 7 colord rainbow form

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