# Polarization in laterally moving reference frame

## Main Question or Discussion Point

Imagine that you are sending photons that are polarized at $45^\circ$, towards a detector that you are facing (e.g. the detectors's input face is parallel to your device/computer screen right now). The detector's polarization axis is also oriented at $45^\circ$, so all the photons are registered.

An observer is moving from your left to your right. Would the $45^\circ$ orientation of the detector be something different in this observer's frame? Would the photons' polarization be different? (Obviously, both would have to change in such a way that the observer's physics would predict 100% detection -- how would that work out?)

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andrewkirk