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Is it possible to see a full circle of a rainbow from Earth?

Is it possible to see a full circle of a rainbow from Earth?

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Rainbow occurs due to reflection and splitting of sunlight from small water droplets.Calculation shows that if in atmosphere enough droplets is present then you can see rainbow if you stand with your back facing the sun at an angle of 40 - 42 degree with the line connecting your head and its shadow on ground ,called antisolr point( see figure).Hence a rainbow is actually observable in circle around this line. But due the the presence of ground we can see only upper half of it. However, if you ever be in a airplane with proper condition of rainbow in atmosphere you can be lucky to see a full circle.

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