How many of you understand Einstein's theories ?

Many of these theories require abstract math(ex relativity) Which i have not studied in depth.But i am interested in these .There are also some which can be deduced from pure logic and expts(ex photoelectric effect).

I have found no reponse to this post from last 1 Weeks... I have seen many user's post does not get any resonse. Some say its because they dont find the post quality one. But I have seen many post which are interesting but no response. And in some other cases, the post may not be interesting but member look out for some specific information. So just thought if we can respond to this post and make it alive... So request all to put up their valuable reply and make each and every post of mylot interesting. Thank you