You are exactly right! In upper-level physics, E and B fields are combined
into one tensor (a matrix) which expresses itself as a certain amount of E
and a certain amount of B depending upon the refernce frame that you are
measuring in.

You are also right that photons have no charge. I do believe that they have
spin, however. I don't know the magnitude off hand, but IIRC, their spin
vector corresponds to their polarization.

Sean

At 04:58 PM 9/23/99 EDT, you wrote:
>I think that electrons are attractee/repulsed by an electric field is because
>they have a charge. Similarly, when they see a B (magnetic) field moving
>relative to them, then they experience a force because the B field looks like
>an eleactric field.
>
>Photons are not charged and do not respond to E or B fields.
>
>The situation with spins is that electrons have spin 1/2 and photons have
>spin 0 (I think).
>
>David
>
|
| Sean Breheny
| Amateur Radio Callsign: KA3YXM
| Electrical Engineering Student
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