q*c
发帖数: 9453 | 1 There IS
field change, EVEN in the static case.
Suppose the big sphere is R1 and final small sphere is R2.
Then, initiallly, in the space DELTA = { R1 > r > R2 } , E == 0.
Then inflation happens and during the process, the space DELTA
change from 0 to KQ/r^2, whatever r is. So u see,
this is the source of EM field. The energy source is from external force.
I think Microsystem's view in Energy is totally wrong.
there has some other source to push the ballon to thrink.
it will just automatically | S*********g
发帖数: 5298 | 2 My solution is following:
The deflation means the acceleration and deceleration of the charge,
which induces the EM waves according to the Maxewell equations.
And, the EM waves will propogate in the vacuum. | S*********g
发帖数: 5298 | 3 Leave alone the logic if you don't have courage to admit your mistake.
I agree there is a radiation.
But, I don't agree the number you gave us since I don't think the EM energy
is conserved. Think about the osccilator that generates the TV signal.
There is a energy trandformed into EM energy.
If you do care about the amount of radiated energy, you can do following excise
A charge accelerate from static to 1m/s in 1 sec, then decelerate to static
in 1 sec again. You can calculate the radiated en |
|
