Are there any free online reliable resources to learn SR and GR?
Hi bqq, rather good starters are Einstein's summaries- even if some modern resources are easier.
An important advantage is that you won't have to unlearn misinformation about SR and GR. Thus :
You can replace §3 by http://www.bartleby.com/173/11.html and http://www.bartleby.com/173/a1.html
[EDIT:] See a not-so-subtle modification at the bottom of: http://math.ucr.edu/home/baez/physics/Relativity/SR/TwinParadox/twin_gr.html - and note also that all the first-order effects can be derived without tensors but I don't know a web resource for that.
On SR there is also for example http://galileoandeinstein.physics.virginia.edu/lectures/michelson.html - very clear resource but regretfully with a few serious glitches.
[EDIT: see https://www.physicsforums.com/showpost.php?p=4105964 + https://www.physicsforums.com/showthread.php?t=641102&page=2]
For GR on line, my favorite for learning from is:
Thank you very much.
Do you know an on line version of "The Meaning of Relatvity" by Einstein. Unlike all of your links, this was his most complete exposition of SR and GR for a professional audience (and also includes his final version of unified field theory). It is, in a real sense, Einstein's last word on all these matters:
- has updates past 1950 [by Einstein; latest revision less than 2 yrs. before his death.]
- full mathematical depth for the professional audience
I always prefer it over everything earlier/simplified, but I have never found an online version of it.
I'm not terribly familiar with it, but Projet Guttenburg has it , apparently. http://www.gutenberg.org/ebooks/36276
Please note, this modification is only of the axiomatic basis and side philosophy. Note, for SR dozens of different axiomatic bases have been proposed, leading to the same result; for GR, MTW list 6 axiomatic bases of GR. The theory (equations + definition of observables) has not changed.
[Edit: Let me clarify that despite above quibble, I wholeheartedly agree with Harrylin's list of links as great way to get going.]
Apparently not. That forms just the first part of the book periodically issued by Princeton whenever Einstein updated it. It doesn't have the two newer sections on cosmology; and the unified field theory. I suspect it doesn't have assorted corrections throughout the text.
Regretfully I don't know an online version including past 1950 updates; and there is an obvious reason why, even if I knew one, I could probably not (yet) post it here!
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