math formulation of phase difference between two linear polarization

Status
Not open for further replies.
Y

yefj

Advanced Member level 5
Joined
Sep 12, 2019
Messages
1,628
Helped
1
Reputation
2
Reaction score
5
Trophy points
38
Activity points
9,839
Hello , I Have two linear polarizations wave propagates at z direction. one in 90 degree Y direction an the other in 180 degrees -X.
So there is a phase of 90 degrees between my polarization.
Why its not considered to be circular polarizar then?
Thanks.
 

Sort by date Sort by votes
If you can write your superposition like this:

then it can be written as:

so if you pick a fixed position as an observer like z=0, then you have:

And above expression shows that the direction of the electric field is rotating with time, therefore it is a circularly polarized plane wave.
 

Attachments

  • 1673339068736.png
    2 KB · Views: 162
  • 1673339139114.png
    2 KB · Views: 158

Upvote 0 Downvote
yefj said:
Hello , I Have two linear polarizations wave propagates at z direction. one in 90 degree Y direction an the other in 180 degrees -X.
So there is a phase of 90 degrees between my polarization.
Click to expand...
Why do you say "so"? Phase shift between waves is an additional property and has nothing to do with oscillation plane. If both wave have additionally a phase difference, you get circular polarization, otherwise it's still linear, e.g. 135 degree if both waves wave equal magnitude.
 

Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…