How can we observe if an object is a color we can’t see?

Question

From what I understand, humans can see red green and blue and everything in the middle. Some animals I’ve heard see more colors than us, so what’s to say that some things in nature are colors that we don’t see? Who’s to say that some apples are red? And instead a different color that we don’t have a name for because we can’t process it?

How can we tell if this “apple” is as a matter of fact “red”.

In: 75

Answer 1

We know some animals can see light on a wider spectrum than us, a little way into what we fall infrared and ultraviolet. Some things shine in those colors that we can’t see. Like some flowers look bland to us, but they’re bright and visible to an insect that can see that light.