Answer:
Refraction, reflection, and dispersion of light through water droplets in the atmosphere.
Explanation:
Rainbows are usually visible after the rain. This is because there are still droplets of water that are suspended in the atmosphere and have not yet hit the ground. When light passes through these droplets, three things will happen at the same time.
To the bare human eye, light seems to be white or have no color at all. In reality, light is composed of all the primary and secondary colors (ROYGBIV). Each color represents a wavelength.
When light passes through a medium, it appears to bend (refraction). This is because the light is made of several wavelengths and each of these wavelengths would travel or act differently (dispersion) when going through a material. The difference will now become visible because some travel faster than others, making the colors "split up". Since the droplets are circular or globular, the different colors will reflect back into the atmosphere.
Rainbows are only made of light and can only be viewed at certain angles. If you are looking at a rainbow, a person who is in a different location may not see it or may see a rainbow that looks different. Since rainbows are not solid, liquid, or gas, they do not have a physical location. Trying to find the end of a rainbow is impossible.
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