If an electromagnet were to pulse on for a femtosecond and then off again 1 femtosecond later, would a sensor at a distance light travels in that 1 femtosecond ( 0.3 µm (micrometers)), feel the pulse? And if so I have a followup question.

So, the follow up: Replace the sensor with a second electromagnet timed to turn on precisely when the 1st field arrives and then turn off the 1st precisely when the 2nd field reaches the 1st (1 femtosecond later 2 femtoseconds into the experiment) so as to not allow the 1st electromagnetic to react with the 2nd.. Would we have precisely 1picoseconds of interaction of the second magnet by something that wasn't reacting back. It would seem that some kind of rule would be broken as only the 2nd magnet would feel attraction or repulsion.

Do the magnetic fields have to couple before there is an attraction or repulsion? Why would they couple if they were unaware of each other and not already reacting? My feeling is that the 2nd magnet would repulse or attract immediately upon arrival of the field lines from the 1st electromagnet.

It would seem necessary to make adjustments for collapsing and expanding fields and for the reactions of the unactivated electromagnetics themselves to the expanding or retracting flux.

Just something to think about.

Question

If an electromagnet were to pulse on for a femtosecond and then off again 1 femtosecond later, would a sensor at a distance light travels in that  1 femtosecond ( 0.3 µm (micrometers)), feel the pulse? And if so I have a followup question.

So, the follow up: Replace the sensor with a second electromagnet timed to turn on precisely when the 1st field arrives and then turn off the 1st precisely when the 2nd field reaches the 1st (1 femtosecond later 2 femtoseconds into the experiment) so as to not allow the 1st electromagnetic to react with the 2nd.. Would we have precisely 1picoseconds of interaction of the second magnet by something that wasn't reacting back. It would seem that some kind of rule would be broken as only the 2nd magnet would feel attraction or repulsion.

Do the magnetic fields have to couple before there is an attraction or repulsion? Why would they couple if they were unaware of each other and not already reacting? My feeling is that the 2nd magnet would repulse or attract immediately upon arrival of the field lines from the 1st electromagnet.

It would seem necessary to make adjustments for collapsing and expanding fields and for the reactions of the unactivated electromagnetics themselves to the expanding or retracting flux.

Just something to think about.

vincent-lyon.fr · Answer

Yes it would.

anonymous · Answer

1 nanosecond=1x10^-9 second.wooow.first to invent such a gadget.which works just like the computer programme..fast to accelerate finish fast.if u can invent such a gadget..why cant a sensor from 3*10^8 meter far; sense it?

anonymous · Answer

@Angela9292, a sensor one light year away would not detect the electromagnet's magnetic field because the magnetic field strength at that distance would be exceedingly small, vanishingly small.

anonymous · Answer

yeap PsiSquared.. how come i never thought of it?? such a shame. :)