Waves All notes provided by Alyse Consiglio of LaBrae Middle School.

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Presentation transcript:

Waves All notes provided by Alyse Consiglio of LaBrae Middle School

Wave  A disturbance that carries energy through matter or space  Medium — the matter through which a wave travels. The actual medium is not moving; it just has energy moving through it.

Name the Medium  Waves on a pond Water  Sound from speakers Air  Seismic Waves Earth

 Waves that require a medium are called mechanical waves.  Electromagnetic waves do not require a medium.

Wave Movement  Waves travel from their point of origin equally in all directions.  Energy spreads out as it moves away from the point of origin, decreasing in intensity as it spreads.

Simple Harmonic Motion  A mass on a spring can bounce up and down forever (neglecting friction).  This repeating cycle is simple harmonic motion, or SHM.

Two Types of Waves  Transverse — Particles in medium move perpendicular to the movement of energy  Longitudinal — Particles in medium move parallel

Surface Waves  Move differently because they occur at the boundary between two media.  Particles move in circles.