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Understanding Waves: Types, Mediums, and Movement Explained

This resource provides a comprehensive overview of waves, detailing key concepts such as the nature of waves as disturbances that carry energy through a medium. It explains the differences between mechanical waves, which require a medium, and electromagnetic waves, which do not. The text covers wave movement from their origin, the concept of simple harmonic motion, and distinguishes between transverse and longitudinal waves, as well as surface waves. These principles are crucial for understanding how energy propagates through various mediums like water, air, and earth.

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Understanding Waves: Types, Mediums, and Movement Explained

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

  2. 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.

  3. Name the Medium • Waves on a pond • Water • Sound from speakers • Air • Seismic Waves • Earth

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

  5. 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.

  6. 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.

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

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

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