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Old 10-24-2010, 03:55 AM #1
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Default Laser/Magnetic Field Question

Would anything happen to the beam of a 150mw 405nm laser if it is pointed into the hole of a doughnut-shaped coil that is producing a magnetic field of about 900 Gauss? Would the beam be affected, and if so, how?

Thanks in advance,

Tim


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Old 10-24-2010, 04:05 AM #2
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Default Re: Laser/Magnetic Field Question

I have passed a laser directly over some dangerously powerful Neodymium Iron Boron magnets (another hobby :P) and try as I might wasn't able to get any effect out of them when observing the dot carefully at a considerable distance. I assume you would need to get into the laboratory grade super conductor materials with machinery the size of your car to get any noticeable effect if at all out of a beam of photons.

Note: I'm not a physicist here so I could be wrong about them being influenced at all by magnetism, I was curious as well since beams of electrons are so easy to manipulate with magnetic fields as seen in cathode ray tubes, however photons are a whole different kind of beast. Wave-particle duality and quantum physics and all that fun stuff :P

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Old 10-24-2010, 04:43 AM #3
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Default Re: Laser/Magnetic Field Question

As photons do not carry a charge you will not see any change even with very large magnetic fields. Only warped space/time will effect the path (curved).

There are spectra changes due to strong electric fields. Google Stark Effect, Zeeman Effect and Paschen-Bach Effect.
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Old 10-26-2010, 07:34 AM #4
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Default Re: Laser/Magnetic Field Question

Those effects are all splitting energy levels of atoms, so it would only affect the light source. Things like the Pockels effect, Kerr effect of Faraday effect would change a medium that light is traveling through. In vacuum the magnetic field won't do a thing, and al the mentioned effects are (if present at all) not possible to achieve in air.
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Old 11-17-2010, 10:11 PM #5
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Default Re: Laser/Magnetic Field Question

Nothing would happen, OP.
If anything happens, it's from the magnetic field affecting the medium that the laser is passing through.
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