A moonbow is a rainbow produced by light reflected off the
surface of the moon rather than from direct sunlight. Because
the light is usually too faint to excite the cone color
receptors in human eyes, it is difficult for the human eye to
discern colors in a moonbow. As a result, they often appear to
be white. From the Milky Way to the moon, the beauty of Yosemite
National Park in California, USA, is on display 24 hours a day.
During the full moon of the the spring and early summer,
moonbows can be seen on many park waterfalls.