Wednesday, May 15, 2013

Avenues Rainbows

There was a great rainbow display this evening in the Avenues with very distinct primary and secondary bows.  The primary is the brighter, inside bow, but unfortunately, the pot of gold was located just a bit east of campus.  That's a pity as we're always looking for more funding.

To compensate for my poor photographic skills and the fact that it was nearly impossible to take a picture given that wind was coming from the rainbow's direction and driving rain into the lens, I've doctored the photo below just a bit to help with contrast.

There was some evidence of supernumerary bows on the inside of the primary bow.  I tried to get a good photo, but alas, it was beyond my skills.

For you weather and optics geeks, Les Cowley's Atmospheric Optics site is the cat's meow.  He has a great page on rainbows.  I just learned that the dark area between the primary and secondary rainbow is known as Alexander's dark band and is named for Alexander of Aphrodisias who first described the effect in 200 AD.  Cool.  

1 comment:

  1. You need a roof top web cam for blow by blow (bow by bow) updates.