- #1
- 3
- 0
A moving charge that starts or stops generates a spherical wave-front of EM wave, can the same analogy be drawn for a moving mass?
Reference: Electricity & Magnetism by EM Purcell
Reference: Electricity & Magnetism by EM Purcell
It is a bit more complicated for gravity, but yes, in principle it is possible.So, by drawing analogy with EM, I can easily find the eqn of field of a moving mass, the power radiated or other quantities ???
Right. You need really massive objects accelerating really fast to produce notable gravitational waves.And, as this is highly negligible, is that the reason why it took so long to detect it?
So, by drawing analogy with EM, I can easily find the eqn of field of a moving mass, the power radiated or other quantities ???
And, as this is highly negligible, is that the reason why it took so long to detect it?
More technically, the third time derivative of the quadrupole moment ... of an isolated system's stress–energy tensor must be non-zero in order for it to emit gravitational radiation. This is analogous to the changing dipole moment of charge or current that is necessary for the emission of electromagnetic radiation.
It follows that gravitational radiation is of quadrupolar or higher nature and is directly linked to the quadrupole moment of the mass distribution.