Submitted by samyall t3_11zevj0 in mildlyinteresting
BillyGerent t1_jdd01xv wrote
Reply to comment by sbvp in The sky is a different colour on either side of this rainbow by samyall
Rainbows are not simple! It says that white sunlight is reflected back from inside/under the rainbow, but not above/outside the rainbow (until we get to the colour-inverted secondary rainbow).
[Edit: deleted repeated info about Alexander's Band]
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