Question

How do water droplets stay suspended in air that form rainbow?

Answer 1

Rainbows appear when sunlight shines through water droplets suspended in the atmosphere. Each water dropletbehaves like a small prism, refracting the light and reflecting it back to our eyes. ... You can observe light refraction firsthand by filling a clear glass with water and then looking through the glass.

They stay suspended because they have reached their terminal velocity where gravity and air resistance is balanced

Answer 2

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When sunlight hits a rain droplet, some of the light is reflected. The electromagnetic spectrum is made of light with many different wavelengths, and each is reflected at a different angle. Thus, spectrum is separated, producing a rainbow.