I have wrote answer for this low quality question few months back, which got deleted. However now someone asked other related question , for which my answer can be useful. But now I don't know how to access that answer.
Is there any link or feature by which I can get that answer back.
I know the content of that answer, but i don't want to work on grammer and wording again as i putted enough effort on same last time.
Below is your exact answer
No. this show is not related to big bang theory. Its main characters are scientists (2 physicists, an astrophysicist, and an engineer). Most of the episodes are also made to sound like scientific theories or terms. Not sure if the directors and producers ever revealed why they named it so in any interviews, because I am not able to recall any episode based on big bang theory.
I can just speculate following reasons:
Maybe its because of the fact that those nerds (scientists) evolve slowly to become common man (or less nerdy).
Maybe someone wanted to exploit the meaning of "bang" , which Leonards seems to do with Penny in at least the initial episodes. In fact, it was the main theme of the TV series when started, slowly "Sheldon" become center character due to popularity.
