11. When that happens, the phase difference determines whether they reinforce or weaken each other. 12. This gives us a measure of phase difference as an intensity on the photodiode. 13. The average of two frames yields the original phase difference and thus the color. 14. These phase differences also account for increases, based upon the frequency and the speaker spacing. 15. In wavelengths, what is their phase difference after they have both emerged from the layers? 16. This is made by measuring the phase difference from the GPS signal between two antennas. 17. And as interference decreases, so does the phase difference between sound pressure and particle velocity. 18. Two non-monochromatic X-ray waves are only fully phase differences at each of the constituent wavelengths. 19. Far from a small antenna in the far-field, the EH phase difference goes to zero. 20. These components are in quadrature, i . e . they have a 90?phase difference .
