Why is the color of light different on each side of a rainbow?

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Every rainbow, and in every picture of a rainbow I’ve seen, the sky is always lighter “inside” the rainbow than on the “outside.” What, specifically, is causing this? I understand the basics of light reflection and refraction, but my knowledge is limited and I don’t get the specific mechanisms at play here. Thanks!

In: Earth Science

Anonymous 0 Comments

Are you perhaps meaning [Alexander’s band](https://en.m.wikipedia.org/wiki/Alexander%27s_band)?