socratus wrote:Our knowledge.
Quantum of light (photon) is a point.
Electron is a point/ sphere.
Proton is a point / sphere.
They created an (point / sphere) atom.
This isn't really true... Photons, electrons, and protons aren't points or spheres. They're primarily waves and probability "clouds", that act like points when they interact with certain things. The electron around a hydrogen nucleus is sort of a dumbell-shaped probability function, for example.
==.
Question.
Why does Physics have many branches which
don’t incorporate and doesn’t have Unified theory?
=============.
Mostly because we haven't figured out the specifics of gravity and decoherence yet. We have "normal" physics, or Newtonian physics, which deal with average, everyday objects at average, everyday sizes/speeds/times. But then we discovered that things get weird at really large distances/speeds/times, and that's when relativity stepped in. Then we discovered that things get weird at really small distances/speeds/times, and that's when quantum physics stepped in. The problem is that things that have a huge and obvious effects at the giant relativistic scale, like gravity, have almost no obvious effects at the tiny quantum scale. Similarly, things that have a huge and obvious effect at the tiny quantum scale, like the probability waves and Heisenberg's uncertainty principle, have almost no obvious effects at the large relativistic scale. Trying to figure out how things all come together at the three different scales is a big part of what modern physicists work on.
