The explanation really does not help people who are not familiar with this topic. I find that the following Susskind's lectures explain this subject really wel

The explanation really does not help people who are not familiar with this topic. I find that the following Susskind's lectures explain this subject really well: https://www.youtube.com/playlist?list=PLDDFE71BA2DE55505 https://www.youtube.com/playlist?list=PLDDFE71BA2DE55505 Basically, the key of understanding of special relativity is to start with: Maxwell's equations are correct. But these equations also need to be correct in every reference frame - even if speed of light is constant. How to fix that?