Rainbow photography is a challenging subject for photographers,
simply because of the relative rarity of rainbows and the requirement
for proper lighting, which makes it difficult for photographers to
capture rainbows when they come around. Rainbows are often a sign of
hope, and are mentioned in a variety of historical and religious texts,
and have had a large impact on culture, mythology, art and literature.
Scientifically, however, rainbows occur when light is refracted when
entering a raindrop, reflected off the back of the raindrop, and then
refracted again when exiting the drop, resulting in white light being
split into its spectrum of colors.
