What weather does the rainbow in the southeast indicate?

The rainbow in the east indicates that it will be sunny in the next few days.

Rainbow, also known as Tiangong (Hakka), crosses the rainbow, blushes, etc. , is an optical phenomenon in meteorology. When sunlight hits the water droplets in mid-air, the light is refracted and reflected, forming an arched colorful spectrum in the sky. From the outer ring to the inner ring, there are seven colors: red, orange, yellow, green, blue, indigo and purple.

Most people don't notice neon because they don't take the initiative to observe it. Neon is a dim sub-rainbow, which often appears outside the main rainbow. Neon is produced by two reflections and two refractions of sunlight in raindrops, and the emergent angle is 50-53. As a result of two reflections, the color arrangement of neon is opposite to the arc of rainbow, with blue outside and red inside.

Neon is darker than rainbow, because two reflections not only let more light escape, but also spread more widely. The dull sky between rainbow and neon was first described by Alexander, so it was named Alexander Belt.