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joigus last won the day on January 27

joigus had the most liked content!

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About joigus

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  • Birthday 05/04/1965

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    Biology, Chemistry, Physics
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    Theoretical Physics
  • Biography
    I was born, then I started learning. I'm still learning.
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  1. Well, yes but: (my emphasis) Also: (my emphasis) Also: This recurring point is what I mean by off-shell. Can you address any of these questions? You can get all kinds of weird things by adding 4-vectors, one pointing to the past light-cone, and another pointing to the future light-cone. You can obviously get the 4-vector, \[\left(u^{0},\boldsymbol{u}\right)+\left(-u^{0},\boldsymbol{u}\right)=\left(0,2\boldsymbol{u}\right)\] But that's unphysical. That's what we're trying to tell you.
  2. Exactly. And even for macroscopic objects, what they look like strongly depends on the kind of radiation we use to look at them: https://www.wired.com/2014/04/the-world-looks-different-when-you-see-in-infrared/ When you look at this person covered by a plastic bag, couldn't we say that "normal" reflected light is deceiving you, by offering a picture of the object that is actually less faithful than emitted infrared light? In order to get an infrared picture of the object, we also need to map these colours somewhere in our visual cortex. So there is a neurological aspect about th
  3. (my emphasis) I take it that humans are neither moving nor non-moving. Who invented the third? We, the weird ones? Before "we" existed? I disagree with @MigL: This is way past silly. It is a meandering nonsense.
  4. I don't want to be insulting but this doesn't look promising as the start of a theory about the Earth.
  5. If you can afford a long-night vigil, you can see it in the Summer too. Slimmer chance of an overcast sky, perhaps. At least in Spain, where I live. 7 years ago, I was stopped on the outskirts of the village where I lived by the rural police --Guardia Civil--, who asked me for ID, and had lots of questions for me, none related to Orion. They couldn't believe I was crazy enough to relish in contemplation of "lovely Orion" at past 5AM almost in the middle of nowhere, trying to catch glimpses of Betelgeuse. A kindred spirit.
  6. Politics aside, the Sokal affair still gives me food for thought, even all these years down the road. I knew it would interest you. Thanks for appreciating it. If you overlook the political implications, there's still a lot to be learnt concerning this topic on purely scientific/philosophical grounds.
  7. No way to get lost that way, unless you're a flat-Earth advocate... So what if so? Don't tell me you're a covert ageist. Marilyn Monroe never gets old.
  8. Trying very hard to picture Pope Francisco as a bouncer in a club --unsuccessful so far.
  9. I think I'm ready for a straight answer to what was, after all, a straight honest question: Could Moses, the Book of The Dead, the Greeks and early Christian writings conceal the scientific technology of gods? The answer is yes, they concealed it so well that nobody can find a trace of it.
  10. Yes, I've read the Epic of Gilgamesh, commented by Andrew George, and I don't remember anything about lasers.
  11. @Abhirao456 You may be interested in this: https://en.wikipedia.org/wiki/Sokal_affair It's very much related to what @iNow's point.
  12. Not a single useful rule to be applied empirically have I found there. Nor a single useful rule to be applied in an explanatory way. Many pompous words, that's all. You should have to find an expert in cosmogony, the mind, matter, ethology, and what not, to be 100% sure whether he's making any sense at all. For the time being, I will stick with other's opinions that it's mostly word salad. Just to clarify, I'm not a professional theoretical physicist, although I've had all the training, and keep up-to-date reasonably well. But my approach is very much on the mathematical/conceptual
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