Can magnets bend light rays?
Can magnets bend light rays?
James Russell
Christopher Peterson
No. While they are electromagnetic phenomena, light waves themselves have neither electrical charge nor a magnetic moment.
In other words, light rays pass through (static) electromagnetic fields just fine without interference.
Daniel Jackson
They can however rotate the polarisation axis of say linearly polarized EM waves.
Blake Hall
Faraday rotation.
Charles Robinson
Caleb Hall
If it's big enough it can.
Jaxson Fisher
what are non static em fields?
Brandon Robinson
example: you moving a magnet
example: light
example: electric field around a wire where AC current goes through
Christopher Morales
can you elaborate what (static) em fields are in the same manner?
because I thought non-statics where static too
Andrew Rivera
/thread
John Sanders
I don't think the Faraday effect will always prove it correct
Isaiah Williams
Kind of: you can create a pseudomagnetic field using anisotropic, inhomogeneous materials which will bend certain polarization states of light.
journals.aps.org
Other than that, no.
Tyler Long
Take Maxwell's equations and drop the time dependent terms. Basically anything you can do such that the fields you create aren't changing is considered static (electrostatics or magnetostatics). If you turn off a solenoid, the magnetic field goes from strong to nonexistent, therefore it changes (and isn't static). A changing electric field induces (important word) a magnetic field and a changing magnetic field induces an electric field. You can easily derive a wave equation (actually 2) from Maxwell's equations and the speed of the wave is exactly the speed of light. An amazing coincidence? Of course not, we learned that light is electromagnetic radiation.
Ryder Martin
>A changing electric field induces (important word) a magnetic field and a changing magnetic field induces an electric field.
Not trying to nitpick, but something to think about:
en.wikipedia.org
>There is a widespread interpretation of Maxwell's equations indicating that spatially varying electric and magnetic fields can cause each other to change in time, thus giving rise to a propagating electromagnetic wave (electromagnetism). However, Jefimenko's equations show an alternative point of view. Jefimenko says, "...neither Maxwell's equations nor their solutions indicate an existence of causal links between electric and magnetic fields. Therefore, we must conclude that an electromagnetic field is a dual entity always having an electric and a magnetic component simultaneously created by their common sources: time-variable electric charges and currents."
Jose Williams
It does seem a little nitpicky, but I like that way of thinking--thanks for the link.
Mason Jones
Is that a FDTD simulation?
Sebastian Butler
kek
Xavier Flores
No, just a conceptual animation. FDTD sims solve for the fields, not rays.
Blake Bailey
>>Other than that, no.
>what is the bending of the worldline of a photon by a mass
fucking undergrads again
Julian Reed
>>what is the bending of the worldline of a photon by a mass
>>Can magnets bend light rays?
Fucking brainlet can't pay attention to the subject.
Brandon Price
That's not a magnet though, is it?
>implying an undergrad would know about gauge field optics
Colton Carter
Not that user, but many commercially available magnets also have mass.
I didn't mention that as an answer to the OP, though, because I'm not a smartass and saying "well, technically, the gravitational field of a magnet could bend the light" is both incredibly point-missing and completely unhelpful.
Isaiah Barnes
>Not that user, but many commercially available magnets also have mass.
and?
The path doesn't change if you have a steel mass and swap it with a magnet of the same mass.
kill yourself.
Austin Davis
OP asked if a magnet could bend light. Things with mass can bend light. Magnets can have mass.
Therefore, magnets can bend light.
However, this is incredibly fucking pedantic and unhelpful and completely misses the point, which is why I didn't bring it up and wrote this () instead.
Bentley Wright
Could everyone pls calm down?