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secondary rainbow

a faint rainbow formed by light rays that undergo two internal reflections in drops of rain, appearing above the primary rainbow and having its colors in the opposite order.
Origin of secondary rainbow
First recorded in 1785-95 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Historical Examples
  • Very commonly a secondary rainbow is seen, concentric with the primary bow, and having a radius of about 50 degrees.

    Meteorology Charles Fitzhugh Talman
  • Why are the colours of the secondary rainbow fainter than those of the primary?

    The Reason Why Anonymous

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