Re: Does a Magnet's force weaken witht the distance cube?


Randy Poe wrote:
guskz@xxxxxxxxxxx wrote:
http://hyperphysics.phy-astr.gsu.edu/hbase/forces/isq.html#isq


The link above shows Gravity, Light(photons), and Charge (I believe
sound waves also): all these weaken with the distance square.

How about Magnets...I think there's is the distance cube which is
strange since EM waves are made of photons and photons above weaken
with the distance square???

Photons don't "weaken" with distance. A photon that
arrives here from 1 billiion light years away is the same
photon that left its source.

Don't forget about the gossamer winged butcher that carves
the photons into bite sized pieces and gives them wrist watches.

<<
The fringe pattern arises when the light beams from the
two 1.8-m telescopes are brought together inside the
VINCI instrument. The pattern itself contains information
about the angular extension of the observed object, here the
6th-magnitude star HD62082.
The fringes are acquired by moving a mirror back and forth
around the position of

***equal path length***

for the two telescopes. >>
http://www.eso.org/outreach/press-rel/pr-2005/pr-06-05.html

Sue...


Magnetic fields fall off as 1/r^3 because all the magnetic
sources we know are dipoles, with a north and south pole.
The electric field from an electric dipole (a clump of
positive charge some distance away from a clump of
negative charge) also falls off as 1/r^3.

- Randy

.

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