5 ms·
Isn't it inverse square?
by FabHK 7y ago
Isn't it inverse square?
- mlyle 7y agoNo. Magnetic fields fall off as 1/d when d is small compared to the size of the magnet, progressing to 1/d^3 when d is large compared to the magnet. (E.g. weird edge case-- it's inversely proportional to distance from an infinitely long wire). Electromagnetic radiation from point sources falls off as 1/d^2.
- FabHK 7y agoThanks a lot, both of you, learned something!
- egdod 7y agoNo, it’s a dipole moment instead of a monopole like electric charge. It goes as 1/r^3 in the far field.