[Physics] How to a 360 Degree Rainbow be formed?

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Just a while ago while I was reading news paper, I saw an amazing article. Someone had caught a photo of a 360 Degree Rainbow.

But how is it possible. I mean after refraction the only rainbows that should form are either VIBGYOR Rainbow or the ROYGBIV Rainbow due to the change in angles.

So how can a 360 degree rainbow be formed?

Best Answer

Its all upto the relative position of the observer and the sun. The imaginary line connecting the centre of the rainbow and eye of the observer called the line of vision makes the apparent struture of a rainbow. If the line of vision is a straight horizontal line with respect to the surface of the earth. You will definitely see a 360 degree rainbow.

I daily life events, you can see this from an aircraft.