送交者: cktears 于 2010-04-27, 16:39:57:

回答: particles with zero mass 由 oo8 于 2010-04-27, 13:57:47:

• there's only one concept of mass. (无内容) - oo8 (0 bytes) 2010-04-27, 16:49:38 (435736)
  • photons have mass which equals to hv/c^2, only rest mass is zero (无内容) - cktears (0 bytes) 2010-04-27, 18:35:57 (435745)
    • Your so called mass is another term of "energy", not the real mass (无内容) - oo8 (0 bytes) 2010-04-27, 19:02:30 (435748)

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