[dleviwing]

Socratus;
Lincoln Barnett’s book is excellent for the general population who wish to have some idea of Einstein’s work but it is hardly a reference for science terminology or even science. Mr. Barnett does not even have a degree in any of the physical sciences.

Both Energy and Mass are quantitative measurement terms; otherwise they are dimensions and not entities of the universe. That is why the terms are related by a factor of motion. (c^2) Don’t worry socratus, you seem to have good clarity of thought; just get a better selection of real science text!

BTW: My statements are facts, not opinions. Don’t be another pinhead that thinks facts are debatable or that you comprehend them better than someone with over 40 years experience in the field of radiometry and scientific instrumentation.