Do rainbows exist objectively or only in our imagination?

Depends on how you define them. Color and sound are abstractions, and they are convenient because of the way the human brain and sensory system work. In the absence of humans, you can talk about, for instance, the frequency of light. read more

Rainbows are patterns of light. Yes, the pattern of light that is a rainbow exists objectively. A camera can record the rainbow's pattern of light just fine without any intelligent humans around to imagine it. If you had the idea that a rainbow was more than a pattern of light, then that would be false. read more

Yes they do. The term EXIST means something that is in existence. As long as you can see it, feel it, touch it. Or react to it in any other way it exist. If it did not exist. We would not have pictures of it. Or have so much information on how to even create one. read more

One circle is marked "imagination". It's HUGE. Then other circle is marked "reality". It is dwarfed by imagination. The circles overlap, but not by much; more of reality is within imagination than visa-versa. Of course it is possible to imagine real things. The Harry Potter books take place in London, and London is real. read more