Question: Explain the circumstances that enable a particle to move un-deflected, with uniform motion, through an electric field, if it is given an initial velocity perpendicular to the electric field.

What I have so far: So I know that normally in an electric field which the particle is traveling perpendicular to the electric field it will change its course to be traveling with the electric field so how can it go on un-deflected? Like what allows it to do that I have looked everywhere and so far have been unable to find the answer. Please help me!

Consider: what if the particle has no charge on it - like a neutron.

That still doesn't seem likely to me, there is affect with relative charges.

Magnetic Trapping of Ultracold Neutrons

http://www.univie.ac.at/qfp/publicat...es/1979-05.pdf

I would have to guess it is a photon. I believe raw photons are not susceptible to magnetic fields, at least over a certain energy level.

SpringerLink - Journal Article

Characteristics of a Photon

I would guess that the speed combined with the changes between the electro and magnetic planes have something to do with it.

Well sir, I have found that I have came to the same conclusion as you, The true answer to this question is, that for a photon to not be susceptible to magnetic fields and other fields of sorts like soccer and football, you sir, must be bi. Also, that must mean that you are nor positive nor negative, in the sense that you are a transexual lunatic. Thank you sir for your patience. I hope you have fun with other prostitutes of transexual feces.