What are Circumzenithal arcs- an upside down rainbow?

A rainbow has always made us feel closer to heaver but what if you witness the beauty ‘upside down’.

This happened with Ken Butler and his team at Warwick Boat Club who spotted a rainbow upside down.

Initially, they were unable to believe the sight but the colour was intense and far more distinct than you see in a normal rainbow.

According to Met Office spokesman, these are Circumzenithal arcs, which are formed when sunlight refracts through horizontal ice crystals.

These crystals help the arcs make an angle which causes the distinctive upside-down rainbow effect.