|Since light is electromagnetic radiation, would
it be possible to send magnetic charges on a beam
of light, or some other way using light?
|Question Date: 2007-08-03|
As far as we know, there's no such thing as
magnetic charges (not like there are electric
charges). This is because magnetic fields are due
to the movement of electric charges as an effect
of relativity. In fact originally relativity came
from studying the interaction between magnetic and
electric fields. Basically the best way to think
about it is that all magnetic fields come from the
movement of electric charges; and as soon as they
stop moving, there are no magnetic fields (so
there are no magnetic charges).
I don't know what you mean by "charges". Light
is an alternating series of waves of electric and
magnetic field, where the two fields are ninety
degrees out of phase. The strength of the fields
('amplitude') is the intensity of the light, and
the alternation speed is the frequency. The energy
of the light is the product of the amplitude and
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