- #36
bhobba
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bohm2 said:But I wonder how accurate this sentence by Weinberg is
I think its true.
Simply think back to Euclidean Geometry. It talks about points having no size and lines no width so they don't really exist. But after a while it becomes such second nature you believe they do, by which I mean the point and lines you apply it to are the points and lines the theory talks about.
This goes right to the heart of the issue. Such simple ideas are all that's required to do the physics - questions like what reality, is it just math etc etc are basically of no relevance in actually doing the physics. Laypersons often worry about it - but very few physicists do.
And that view has led to the very striking discovery, no amount of philosophising could have possibly arrived at, that at rock bottom, symmetry is the key. That too is written in the language of math ie group theory.
Thanks
Bill
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