For ten points, name this colorful meteorological phenomenon that appears as a spectrum of light in the sky.
A sixth-order one of these phenomena was observed when a HeNe laser beam was shown through a pendant water drop. These phenomena are thought to also exist on Saturn's moon Titan, as it has a wet surface and humid clouds, but, because methane, not water, would be (*) refracting the light, its radius would be 49° instead of 42°, like on Earth. They can be seen near waterfalls or fountains, or in the spray created by waves, but they are better known for appearing after a storm. For ten points, name this colorful meteorological phenomenon that appears as a spectrum of light in the sky.
A sixth-order one of these phenomena was observed when a HeNe laser beam was shown through a pendant water drop.
{Rainbow}s