Home, May 2005
Around our home in April and May.
A mix of sunny and rainy weather gave rise to a number of fine rainbows. Double rainbows are actually much more common than one might think, but one does need to look for them. In the closeup, the sky between the two rainbows is slightly darker; this is known as Alexander's dark belt, and in some sense represents the missing light that has been diverted into the rainbows themselves. The primary rainbow is light that has been totally reflected within the raindrops, then refracted back out. The secondary rainbow has been reflected a couple more times within the raindrops, with more light leaking out, so it's fainter, and the colors are reversed from the primary rainbow.