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Nov 10, 2018 at 22:54 comment added jkien @ Michael: The parallax of the rainbow is discernibly zero. Zero parallax means the observed image is infinitely far away. For example, in geometrical optics, a zero parallax image is formed at infinity behind a lens, if the object distance is equal to the focal length.
Oct 31, 2018 at 13:27 comment added Michael Seifert Note also that you can't use optical parallax to judge the "distance to the rainbow" because (as you correctly point out) all the light rays are entering your left eye and your right eye at the same angle. Since there's no discernible parallax between the two views, the rainbow appears to be "very far away."
Nov 6, 2017 at 11:31 vote accept Ayushi Bansal
Nov 6, 2017 at 11:31 vote accept Ayushi Bansal
Nov 6, 2017 at 11:31
Nov 4, 2017 at 14:40 history answered Daniel Griscom CC BY-SA 3.0