I'm a little unsure of my own answers to these questions. Hopefully I'll clear up my misconceptions. 1. If I measure the E-field and B-field at a point in space where there is an EM wave, would I be able to determine the direction it propagates from? My Ans: I don't think so, since when you do a reading a a point, you only get the scalar value 2. If a point charge +q lies on the x-axis and is in the path of a sinousoidal EM wave, will the point charge move? My Ans: I believe it would just oscillate at that point 3. Most vehicles have got upright and vertical receiving antennas. What does this tell about the E-field polarization of the radio waves that are being broadcasted? My Ans: It is vertical. 4. Does electromagnetic standing waves have energy? Does it have momentum? My Ans: Yes. Yes Could anyone go through my answers and let me know if I have any misconceptions? Thanks!