What is what does it mean when you see a double rainbow?

A double rainbow is a meteorological phenomenon that occurs when sunlight is reflected twice within a raindrop. This creates two distinct arcs in the sky.

Here's what it means when you see one:

• Optical Phenomenon: The primary, brighter rainbow is formed by sunlight entering a raindrop, reflecting once off the back of the raindrop, and exiting. The secondary, fainter rainbow is formed by the same process, but the light reflects twice inside the raindrop. This double reflection causes the colors of the secondary rainbow to be reversed compared to the primary bow. Red is on the inner side and violet is on the outer side.
• Reflection and Refraction: Both rainbows are the result of reflection and refraction of light.
• Formation Conditions: Double rainbows are most commonly observed when the sun is low in the sky, after or during a rain shower. They require specific atmospheric conditions, making them relatively rare and visually striking.
• Dark Band (Alexander's Band): The area between the two rainbows is noticeably darker than the sky outside the rainbows. This is known as Alexander's band or Alexander's dark band. Light that would normally brighten this area is instead directed into the rainbows themselves.
• Symbolism and Meaning: Beyond the science, double rainbows are often seen as symbols of good fortune, transformation, and hope. Some cultures associate them with positive changes and new beginnings. It's up to the individual to assign personal significance to the sight.