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Showing content with the highest reputation on 04/22/18 in all areas

  1. Jajrussel, you should probably go back to basics and have a look at Arthur Compton's work on the particle nature of electromagnetic radiation. https://en.wikipedia.org/wiki/Arthur_Compton https://en.wikipedia.org/wiki/Compton_wavelength
    2 points
  2. By "easy" I mean that we have good theories that can explain what happened from about 10-36 second: https://www.physicsoftheuniverse.com/topics_bigbang_timeline.html Not really. Just that in the grand unification epoch, the particles that existed would have behaved differently than they do now. This is not something I now much about but if the forces were unified, then perhaps the distinct particles we see now were not distinguished. But it probably needs someone like Mordred to comment further. Not just electrical change, though. For example, antiquarks have anti-colour charge. I'm saying we don't know. There are quite a few different models. In some, the universe "starts" with zero energy but in others the matter and energy has always existed. (As has already pointed out, saying that the least amount of energy is "1" is meaningless. And the minimum is zero, anyway.)
    1 point
  3. No, it doesn't work that way. The double-slit (or some other diffraction) experiment would be an example. If a basketball has a deBroglie wavelength of 10^-34 meter, then a diffraction grating would only be a few orders of magnitude larger. But the ability if an electron to pass through as a wave depends on the grating spacing, and the electron's wavelength is about 1 nm for a 1 eV electron. Even at 1 keV it's ~40 pm, which is around 20 orders of magnitude larger than the wavelength of the target.
    1 point
  4. And if you want more detail https://profmattstrassler.com/articles-and-posts/particle-physics-basics/fields-and-their-particles-with-math/
    1 point
  5. I dont know what level you are at, but I was googling wave functions this morning and found this link which my be helpful to you https://www.khanacademy.org/science/physics/quantum-physics/atoms-and-electrons/v/quantum-wavefunction It gives a brief 10 minute over view at the noddy level.
    1 point
  6. 1 point
  7. ! Moderator Note ... and as the chopper's occupants rip the cords on their chutes and waft safely groundward, they try to put some closure on their ideas in the short time they have defying gravity.
    1 point
  8. There's a bit of sci-fi out there where people end up worshipping technology after they've lost the ability to understand it. It becomes like magic to them. And there are people even today who advocate for or against science without understanding it. So the elements are there, even though these people have removed themselves from what science really is.
    1 point
  9. Thanks, Gee. No need to rush your reply. Truth, itself, clearly can't be particular or personal, or open to interpretation, ( i think that's the point you're making, MigL ), but the approach is, of necessity, a personal one: people are all different in temperament, character, abilities, skills, talents and natural proclivities, and have widely varied circumstances and environments to cope with; all these factors play a part - from the cerebral, contemplative monastic orders through Buddha's " Middle Way " to the extreme physical asceticism of some Yogic practices, people have tried different ways for centuries to come to what amounts to the same result. Whatever way we take, though, the normal, insistent demands of everyday-life can't be ignored. I can't say there is a definitive right or wrong approach, as the paths of saints and sinners can all lead to that same epiphany - a ( sudden, sometimes ) insight or relevation, seeing what is " wrong " in what is " right ", and seeing what is " right " in what is " wrong ". ( That Good Thief/Bad Thief routine again! ). I don't have a Bible but i think, ( from childhood memories of a strict Catholic upbringing ), that there is a cryptic quote along the lines of " My Father's house has many rooms " which i interpret as meaning that no-one is excluded from finding that Truth, and there many ways to arrive at the same conclusion. Distance and direction may be different but the destination is the same even though we don't all tread the same path at the same pace - and hear those different drummers.
    1 point
  10. I think what we are seeing through the hubble telescope are not in fact galaxies or stars. I tend to think that without evidence we cannot assume that we are seeing Suns like our own. The concave sphere surrounding our planet is most likely the firmament.
    -1 points
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