what is reason for proper mass according to SR/GR.?

aditya23456

we know proper mass is always constant irrespective of frame ie its invariant(and conserved if I can say).so whats reason for this proper mass.?

Simon Bridge

The reason it is important to use proper mass is well described in wikipedia:
http://en.wikipedia.org/wiki/Invariant_mass

... generally it is useful to look for things that all observers can agree on - it makes the math simpler.

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aditya23456	what is reason for proper mass according to SR/GR.? Tweet we know proper mass is always constant irrespective of frame ie its invariant(and conserved if I can say).so whats reason for this proper mass.?

Simon Bridge Recognitions: Homework Help	The reason it is important to use proper mass is well described in wikipedia: http://en.wikipedia.org/wiki/Invariant_mass ... generally it is useful to look for things that all observers can agree on - it makes the math simpler.