A rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths--or colors. When light exits the droplet, it makes a rainbow.
Rainbow at Suuroy, Faroese Islands. Photo by Erik Christensen. From a flying plane, you might see a full-circle rainbow. Credit: NOAA. Alternatively, you might see the full circle in a fountain or waterfall spray if you are at the right point.
Mountain climbers may sometimes see more of a full-circle rainbow. Even a circular rainbow is an illusion. The illusion is caused because the colours of the rainbow bounce reflect from great distances and we feel as if they are bouncing from a circular surface. Skip to main content. Why does a rainbow appear semi-circular? Why is a rainbow semi-circular? Language English. What is plastic? What is rubber? Sylvia Sanders Jan 17, Aubrey Jan 23, I rock Mar 2, Jan 18, Dayton Oct 14, Oct 17, We're glad to hear you enjoyed this Wonder, Dayton!
Lily Sep 26, Sep 28, Welcome back, Lily! Noelle May 12, May 16, Apr 21, Hi, dallas! Visit again soon!
Apr 7, Li Ming Eniglsh name:christy Dec 28, Hello, I'm a 6th grader. I'm doing a project and this really helps. Finger crossed, hoping that i'll past. If i don'y, thanks anyways.
Dec 28, Grace Dec 11, Dec 11, Hi, Grace! That sounds like a fun project! Very interesting! We hope this Wonder was helpful! Natalia Nov 13, Why do rainbows form and why are they called rainbows? Nov 15, Me and my mom go on a climb in the summer and go find rainbows soon as we get there we land and look behind it and try and look for gold.
Wonderopolis May 4, Sep 17, Amilee Apr 29, I thought the rainbow only had 3 colors but it doesn't. It has 7! From Amilee. Mal Jun 30, Jul 1, We agree, Mal! Thanks for your comment! Wonderopolis Apr 29, Ron Apr 25, Hello I understand that these articles are meant to be simple so kids can easily understand them but could you maybe provide links to more detailed articles next time so that we can learn more about these wonders if we're interested?
I would love to know more about some of the things you mentioned above about rainbows. Wonderopolis Apr 27, I was right of the rainbow thing in last wonder!
Great job, wonderopolis is best! Wonderopolis Dec 3, We're glad you're hanging out with us, Ryan. Double rainbows are extra special! This is very helpful I was given an assignment on rainbows and am glad to find an answer here Wonderopolis Nov 5, Hi Kristy! Hi my name is rockstartanya. I like your name. There are seven colors in the rainbow: red, orange, yellow, green, blue, indigo and violet.
All other colors are reflections of light, except black. Black is the absence of light. Unlike white and other hues, pure black can exist in nature without any light at all. Since violet light has a shorter wavelength, it is slowed more than the longer wavelengths of red light. Consequently, violet light is bent the most while red light is bent the least. This separtion of white light into its individual colors is known as dispersion of light.
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