A rainbow forms when sunlight is refracted twice, first when entering a raindrop and then when exiting it, and reflected once within the drop. Sunlight enters a raindrop on the side of the drop facing ...
Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Can rainbows form in a circle? – Henry D., age 7 ...
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