Instead of allowing any light to escape, the surface acts almost like a perfect mirror, sending all of the light back into the original material.
Total internal reflection is one of those fascinating tricks of nature that most people have experienced without realizing it. Imagine shining a flashlight through a window. Most of the light passes through the glass, while some bounces back toward you. Normally, whenever light travels from one material into another,
In theory, every rainbow is a circle, but from the ground, usually only its upper half can be seen.
A circular rainbow, also known as a “halo,” is a rare and fascinating meteorological phenomenon. While the most common rainbow that people are familiar with is the semicircular arc that forms in the sky after rain, caused by the refraction, dispersion, and reflection of sunlight in raindrops, a circular rainbow is much rarer and more elusive.
Photo by Beau Howard, Medlock Park, Decatur, Georgia
Continue reading “Circular Rainbow”
