Magnetism and Light
can a magnet bend light
Ok, that's not quite true. A magnetic field contains energy,
and energy, through its equivalence to mass, has a gravitational
field, which can bend light. But the effect on light of any
magnetic field we'll ever see would be so small it's utterly
Light is electromagnetic radiation consisting of an
orthogonal electric field and magnetic field. The cross product of
these two fields yield the direction of propogation (E x H = dir.
Prop). Therefore, light can be bent in the effect that it's
polarization changes. This is the principle that allows those nifty flat LCD
screens to work, as well as numerous fiber optic sensors.
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Update: June 2012