Queston On The Theory Of Everything

AI Thread Summary
The discussion centers on the concept of a "megaverse" and the possibility of subatomic structures smaller than strings, including the idea of negative mass. Participants highlight that current physics lacks evidence for structures smaller than the Planck scale, which is approximately 10^(-18) meters, and that probing these scales requires immense energy. The conversation also touches on the historical progression of physics, suggesting that advancements have often led to discoveries at both smaller and larger scales. However, the limitations of current experimental capabilities mean that these smaller entities remain speculative. The topic raises fundamental questions about the nature of reality and the boundaries of scientific inquiry.
sudhirking
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why can't eh idea of the megaverse be expanded downard. thet id\f the universe is part of something bigger, than why can't the same ting be fore subatmic levels and even in the case of the string theories. ssorry if I am typing bad because i am in the school library with only 5 min left.
so why can't there be stuff smaller than strings, and stff smaller and smaller and even there be negative mass. this mass whould be imaginary and parralle to the universe.. right. and then would have the oppsite effects of matter, creating space-time by expanding it.. i need visuals to explain. if at all, we wouldn't be able to see negative mess not only because it is imaginary, but because it is, the relativness is so distorted and away from spac-time, that light is stationary. and with threads posted defore, when something is absoluteley stationary, like light than it is timeless and connot function through space
HELP I NEED ANSWERS oh and if i break any rules, I am so srry I am new to this. pls answer my question. oh and one more thing, if theory of relativity is true, than at subatmoiclevels, canst it make a difference to subatomic stff . srry gottago. mom is waiting for me outside school
srry i f i spell bad
NAWER MY QUESTIONs
 
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There is no rule which says what are guessing is impossible. However, the present state of physics knowledge is such that there is no evidence for the idea of smaller and smaller.
 
Small scales corresponds to high energy in physics. We simply can't probe much below ~ 10^(-18) metres (very approximately). There could be plenty of stuff smaller, but we have no way of seeing it.

Current arguments also suggest that new physics must emerge at or before the Planck scale... so we know at least where the "goalposts" are, although this realm will never be directly experimentally accessible (you need a particle accelerator the length of the galaxy or so)
 
mathman said:
There is no rule which says what are guessing is impossible. However, the present state of physics knowledge is such that there is no evidence for the idea of smaller and smaller.

Doesn't that go against history? Physics knowledge has always progressed towards smaller and larger.
 
https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
The formal paper is here. The Rutgers University news has published a story about an image being closely examined at their New Brunswick campus. Here is an excerpt: Computer modeling of the gravitational lens by Keeton and Eid showed that the four visible foreground galaxies causing the gravitational bending couldn’t explain the details of the five-image pattern. Only with the addition of a large, invisible mass, in this case, a dark matter halo, could the model match the observations...
Hi, I’m pretty new to cosmology and I’m trying to get my head around the Big Bang and the potential infinite extent of the universe as a whole. There’s lots of misleading info out there but this forum and a few others have helped me and I just wanted to check I have the right idea. The Big Bang was the creation of space and time. At this instant t=0 space was infinite in size but the scale factor was zero. I’m picturing it (hopefully correctly) like an excel spreadsheet with infinite...
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