Phase shift

Definition

Phase shift is the amount by which a wave is shifted horizontally from a reference wave. It is typically measured in degrees or radians.

5 Must Know Facts For Your Next Test

1. The phase shift of a sine wave $y = A\sin(\omega t + \phi)$ is determined by the term $\phi$.
2. A positive phase shift indicates a leftward shift, while a negative phase shift indicates a rightward shift.
3. Phase shifts are crucial in understanding the interference patterns of waves.
4. In simple harmonic motion, phase differences can affect the resultant amplitude when two waves superimpose.
5. Phase shifts can be caused by changes in medium, boundary conditions, or initial conditions.

Review Questions

• What does a positive phase shift indicate about the direction of wave displacement?
• How does phase difference influence the interference pattern of two waves?
• In what units is phase shift typically measured?

Related terms

Wavelength:

The distance between successive crests, troughs, or identical points of a wave.

Amplitude:

The maximum extent of displacement of a wave from its rest position.

Interference:

The phenomenon where two waves superpose to form a resultant wave of greater, lower, or the same amplitude.