The Nature of Waves Learning Goals:

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Recognize that waves transfer energy, but not matter.

Define mechanical waves.

Compare and contrast transverse and compression (longitudinal) waves.

WAVES Definition:

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A traveling disturbance that carries energy through matter and space Waves transfer energy without transferring matter.

Waves are produced by something that vibrates.

WAVES Vibrations:

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Movement that follows the same path, repeatedly Most waves are caused by a vibrating object.

WAVES Mechanical Waves:

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Waves that require a medium Two types: transverse and compression (longitudinal) Examples are seismic and sound waves.

Medium: matter (the stuff) through which a wave travels Examples include water, air, and solids.

TYPES OF WAVES

TRANSVERSE

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Motion of particles is perpendicular to the motion of the wave.

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Examples – electromagnetic waves, waves on a rope, water waves

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Draw an example in your notes. (Think of the slinky.) COMPRESSION (LONGITUDINAL)

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Particles in a medium will vibrate parallel to the direction of wave motion.

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Example – sound waves

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Draw an example in your notes. (Think of the slinky.)