Invariant mass Totally Explained

Everything about The Invariant Mass totally explained

The invariant mass, intrinsic mass, proper mass or just mass is a characteristic of the total energy and momentum of an object or a system of objects that's the same in all frames of reference. When the system as a whole is at rest, the invariant mass is equal to the total energy of the system divided by c², which is equal to the mass of the system as measured on a scale. If the system is one particle, the invariant mass may also be called the rest mass.
Since the center of mass of an isolated system moves in a straight line with a steady velocity, an observer can always move along with it. In this frame, the center of momentum frame, the total momentum is zero, the system as a whole may be thought of as being "at rest" (though in a disconnected system, parts may be moving away from each other), and the invariant mass of the system is equal to the total system energy divided by c². This total energy in the center of momentum frame, is the minimum energy which the system may be observed to have, when seen by various observers from various inertial frames.

Particle physics

In particle physics, the invariant mass is a mathematical combination of a particle's energy E and its momentum p which is equal to the mass in the rest frame. This invariant mass is the same in all frames of reference (see Special Relativity). ť

(mc^2)^2=E^2-||mathbf

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