Sometimes I find a particular concept which I can't find much description about in the books I know. Is it accepted to ask for references in such scenarios?
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1$\begingroup$ Related: physics.meta.stackexchange.com/q/4697/2451 and links therein. $\endgroup$ – Qmechanic♦ Sep 29 '20 at 22:16
Yes, this is perfectly acceptable.
Of course, you should make sure that you follow the guidelines given in Are resource recommendations allowed?. To maximize the chances of success of your question:
- provide a description of the concepts that you're interested in with as much detail as you can
- provide a clear picture of what you do and don't understand, so that book recommendations can be given with the correct level of prerequisites
- make sure to look for existing resource-recommendation threads on similar subjects, and if they have a nontrivial overlap with your query, explain why they don't fit your needs