3 ms·

> Sure you do, just by sitting there. I 100% sure that I cannot bend or stretch imaginary coordinate system outside of my imagination. Can you point to real ph

> Sure you do, just by sitting there. I 100% sure that I cannot bend or stretch imaginary coordinate system outside of my imagination. Can you point to real physical process which causes stretching or bending of the mathematical abstraction? > If you seriously believe you can see 4e12 light years through your window, that's probably hallucinogens of some kind (not necessarily intentional). I cannot see objects smaller than a star or galaxy with naked eye. However, we can see light stretched to the microwave range.

ben_w 3y ago
> Can you point to real physical process which causes stretching or bending of the mathematical abstraction? "General relativity" as we keep telling you. > I cannot see objects smaller than a star or galaxy with naked eye. Only a factor of about a trillion in the size of those two things. > However, we can see light stretched to the microwave range. With your eyes? No. And certainly not through your window, whose own thermal emissions relative to the CMB makes your previous claim roughly as unphysical as saying you can look through the sun's photosphere to see Jupiter during an occultation.
- oneshtein 3y ago
  General Relativity is a mathematical model. Model needs mapping between physical world and model.
  - ben_w 3y ago
    My phone's GPS only works because that mapping keeps being better than anything else we've tested on that scale. The atomic clocks (as I mentioned in another comment) demonstrating gravitational time dilation within a building is another fun example.
    - oneshtein 3y ago
      Your phone works because engineers did it. I see strong annual signal in GPS: https://link.springer.com/article/10.1007/s10291-017-0686-6 https://link.springer.com/article/10.1007/s10291-017-0686-6 . Why it there?
      - ben_w 3y ago
        > Your phone works because engineers did it. The engineers implemented results from GR. > Why it there? Not that it matters, but the answer is in the introduction.

ben_w 3y ago

> Can you point to real physical process which causes stretching or bending of the mathematical abstraction? "General relativity" as we keep telling you. > I cannot see objects smaller than a star or galaxy with naked eye. Only a factor of about a trillion in the size of those two things. > However, we can see light stretched to the microwave range. With your eyes? No. And certainly not through your window, whose own thermal emissions relative to the CMB makes your previous claim roughly as unphysical as saying you can look through the sun's photosphere to see Jupiter during an occultation.

oneshtein 3y ago
General Relativity is a mathematical model. Model needs mapping between physical world and model.
- ben_w 3y ago
  My phone's GPS only works because that mapping keeps being better than anything else we've tested on that scale. The atomic clocks (as I mentioned in another comment) demonstrating gravitational time dilation within a building is another fun example.
  - oneshtein 3y ago
    Your phone works because engineers did it. I see strong annual signal in GPS: https://link.springer.com/article/10.1007/s10291-017-0686-6 https://link.springer.com/article/10.1007/s10291-017-0686-6 . Why it there?
    - ben_w 3y ago
      > Your phone works because engineers did it. The engineers implemented results from GR. > Why it there? Not that it matters, but the answer is in the introduction.