:In response to SamHB, I appreciate your thoughtful remarks, but I didn't put the PBS quotation in the entry. Someone else did (I'm not bothering to check who, and don't want to criticize anyone for it). Other quotations may be better, but it is important first to clearly state what the assumptions are underlying the formula. Does it work backwards by trying to conserve energy within the framework of the Theory of Relativity? If so, then the formula derivation really is circular, and the mass is not really a meaningful rest mass. Instead, the mass is something manipulated to try to conserve energy from different frames of reference. | :In response to SamHB, I appreciate your thoughtful remarks, but I didn't put the PBS quotation in the entry. Someone else did (I'm not bothering to check who, and don't want to criticize anyone for it). Other quotations may be better, but it is important first to clearly state what the assumptions are underlying the formula. Does it work backwards by trying to conserve energy within the framework of the Theory of Relativity? If so, then the formula derivation really is circular, and the mass is not really a meaningful rest mass. Instead, the mass is something manipulated to try to conserve energy from different frames of reference. |