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Jun 24, 2016 at 14:19 comment added garyp One of the most frequently encountered ideas on this site is the concept of "relativistic mass". That mass increases with speed. This concept was generally abandoned half a century ago, but refuses to die. In 1948 Einstein himself warned against it in a letter to Lincoln Barnett. If you can read German and Einstein's handwriting you can read it for yourself on page 32 of this June 1989 Physics Today Article by Lev Okun But this fact is just a side-bar to your question, and doesn't address your concerns.
Jun 24, 2016 at 13:36 answer added RGWinston timeline score: 1
Jun 24, 2016 at 13:36 comment added Sanya I do find it a tad disrespectful to tag something as a textbook-erratum just because you do not understand it
Jun 24, 2016 at 13:35 comment added lemon Quantum mechanics is non-relativistic.
Jun 24, 2016 at 13:22 history asked Suhrid Mulay CC BY-SA 3.0