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Physics/Image formation at the retina


if our eye forms an inverted image how do we see things erect?

While this is a biology question, I understand.  We process information as we see it and get used to it.  It's code in an incredibly complex computer that doesn't know (aside from experience of what falls when dropped) what is "up."  There's no inherent "up" or "down" preserved in the brain, it takes a long time just to learn left from right (which is a little more fundamental).  Therefore, the impulses don't care which direction is up, we process what we see as "normal."  It's like learning to shave in a mirror, really, you learn a skill and to process the world based on what you see.


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Dr. Stephen O. Nelson


I can answer most basic physics questions, physics questions about science fiction and everyday observations of physics, etc. I'm also usually good for science fair advice (I'm the regional science fair director). I do not answer homework problems. I will occasionally point out where a homework solution went wrong, though. I'm usually good at explaining odd observations that seem counterintuitive, energy science, nuclear physics, nuclear astrophysics, and alternative theories of physics are my specialties.


I was a physics professor at the University of Texas of the Permian Basin, research in nuclear technology and nuclear astrophysics. My travelling science show saw over 20,000 students of all ages. I taught physics, nuclear chemistry, radiation safety, vacuum technology, and answer tons of questions as I tour schools encouraging students to consider careers in science. I moved on to a non-academic job with more research just recently.

Ph. D. from Duke University in physics, research in nuclear astrophysics reactions, gamma-ray astronomy technology, and advanced nuclear reactors.

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