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The order of a rainbow is determined by the number of light reflections inside the water droplets that create it: One reflection results in the first-order or primary rainbow; two reflections create the second-order or secondary rainbow.
Here’s everything you need to know about rainbows to impress your friends (or search for a pot of gold).
Technically, a rainbow is the upper half of a circle of light, which centers on the antisolar point, the point directly opposite the Sun, as seen from your perspective. The lower half of the circle, however, is usually not visible since the water droplets hit the ground before it can form.
Discover rainbow facts, including how rainbows form, why they appear in the sky and what causes double rainbows.
A rainbow is a multicolored arc made by light striking water droplets. The most familiar type rainbow, including this one in southern Chile, is produced when sunlight strikes raindrops in front of a viewer at a precise angle.
A rainbow is caused by the refraction, dispersion, and reflection of sunlight as it passes through raindrops. As light passes through raindrops, it bends at different rates causing it to spread out into the colors of the visible spectrum.
It is formed when sunlight is refracted and dispersed by water droplets in the air, breaking white light into its full spectrum of color. But what exactly are the sequence of colors that make up a rainbow? Let’s take a closer look at the 7 colors of the rainbow in order.
