Phase Difference Phase Difference is measured in radians, rad
If we look at two particles a wavelength apart (such as C and G) we would see that they are oscillating in time with each other. We say that they are completely in phase. Two points half a wavelength apart (such as I and K) we would see that they are always moving in opposite directions. We say that they are completely out of phase.
The phase difference between two points depends on what fraction of a wavelength lies between them
| B | C | D | E | F | G | H | I | J | K | L | M | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Phase Difference | ½π | 1π | 1½π | 2π | 2½π | 3π | 3½π | 4π | 4½π | 5π | 5½π | 6π |
| Phase Difference | 90 | 180 | 270 | 360 | 450 | 540 | 630 | 720 | 810 | 900 | 990 | 1080 |