A rare reverse rainbow appears

The rainbow is generally convex upward, but it seems that a rainbow depressed in Liverpool, England was observed. This is very rare, it seems that it will not appear unless light is inserted from a specific angle. Also depending on the position of the viewer, people who can see it is very lucky. Let's see a rainbow that has a rare shape.

Pictures are as follows.
Pictured: Rare upside-down rainbow spotted in the UK | Mail Online

UK gets upside down rainbow | The Sun | News

This is the inverted rainbow. It is concave.


According to experts, it seems to appear only when sunlight passes through a small bundled thin cloud at a specific angle (22 degrees) and a height of about 20,000 to 25,000 feet. Besides, it seems to be quite difficult to actually see because it is greatly influenced by the intensity of light, the position of the observer, the situation of the atmosphere. Dr. Astrophysics at Cambridge University commented that "I saw it for the first time although I lived for 60 years," I can tell how rare this is.

Although it is another thing, there is a movie actually shot.
YouTube - Smile Rainbow and Gene Wilder