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Partial Rainbow

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I spotted this rainbow a in rural Mason County. The small pop up thunderstorms made it a great day for rainbows, and this was one of the lowest ones I've seen. The height of a rainbow can be determined by the height of the sun. The radius of a rainbow is always 42°, centered at a point opposite the sun called the "anti-solar point." If you subtract the height of the sun (in this case 33°) from the 42°, then you get the approximate height of the rainbow above the horizon (9°). That is why the biggest rainbows are found near sunrise or sunset. They cannot occur in the middle of the day when the sun is higher than 42°.

Date Taken: August 11, 2014

Copyright
Kevin Palmer
Image Size
4789x3172 / 9.1MB
Keywords
Contained in galleries
Illinois, Storms
I spotted this rainbow a in rural Mason County. The small pop up thunderstorms made it a great day for rainbows, and this was one of the lowest ones I've seen. The height of a rainbow can be determined by the height of the sun. The radius of a rainbow is always 42°, centered at a point opposite the sun called the "anti-solar point." If you subtract the height of the sun (in this case 33°) from the 42°, then you get the approximate height of the rainbow above the horizon (9°). That is why the biggest rainbows are found near sunrise or sunset. They cannot occur in the middle of the day when the sun is higher than 42°.<br /> <br /> Date Taken: August 11, 2014