My first fogbow! It was HUGE! Up over No Name Mountain… just out of the entrance to the Port Alexander harbor. So big I couldn’t get it all in! Since I was on a special-invitation fishing expedition, I didn’t dare ask the Captain to stop. Wish I had!
A fog bow is similar to a rainbow, but because of the very small size of water droplets that cause fog, smaller than 0.05 mm, the fog bow has no colors and appears white. Fogbows are sometimes called “white rainbows” or “cloudbows”. Mariners sometimes call them “sea-dogs.”
The fogbow’s lack of colors is caused by the smaller water drops… so small that the quantum mechanical wavelength of light becomes important and smears out colors that would be created by larger rainbow water drops.
A fogbow is seen in the same direction as a rainbow, thus the sun would be behind the head of the observer and the direction of view would be into a bank of fog (which may not be noticeable in directions away from the bow itself).
I loved the light and colors in the photo taken one minute prior to this, when the fogbow was just forming:
RAW (NEF) pp in DXO, LR2, then JPG in CS3.
July 8, 2009 7:02am
D90 18-200mm Lens
18mm 1/500 f/8 ISO 100