Sorry if that question is too noobish but i wonder- we can make laser beam and it can go far in distance without loosing much of its power.
To my understanding magnetic field just propagates around its source (like magnet).
Can we do something to concentrate magnetic field so instead propagating in all directions it would "beam" into only one direction?
Solenoid can "narrow" magnetic field inside of itself. I thought about something that could be done over air.