So I know that rainbows happen when sunlight gets bent and spread out by raindrops, kind of like how a prism works.
And I get that a rainbow is something I see based on where I am and where the sun is shining from behind me.
What puzzles me is this: since those raindrops (acting like little lenses) are always falling and moving around, why doesn’t the rainbow flicker, shift, or vanish?
Especially during light rain when there aren’t that many raindrops to begin with. It’s hard for me to imagine that as one raindrop falls out of place, another one perfectly replaces it immediately.
How does the rainbow stay so stable and clear to me under these conditions?
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The same reason why if you squint your eyes, static can look like a grey blob. The drops are so small and so far that their movement is just interpreted as “fuzziness” by your brain.
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