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Waves!

Waves!. Electromagnetic Waves . True or False? Light waves are electromagnetic waves. True!

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Waves!

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  1. Waves!

  2. Electromagnetic Waves • True or False? • Light waves are electromagnetic waves. • True! • Electromagnetic waves and light waves can travel through the vacuum of outer space and do not require a material medium (a substance or material that carries a wave. A medium carries or transports the wave from its source to other locations.) in order to transport their energy from one location to another (mechanical waves do). • http://www.physicsclassroom.com/mmedia/waves/em.cfm

  3. Longitudinal waves • True or False? • Waves travel perpendicular to the direction of energy transport. • False! • Longitudinal waves travel PARALLEL to the energy transport. • http://www.physicsclassroom.com/mmedia/waves/lw.cfm

  4. Transverse Waves • True or False? • A transverse wave moves up and down (perpendicular to) the direction that the wave moves. • True!

  5. Longitudinal Vs. Transverse

  6. Sound Waves • True or False? • Sound Waves are Mechanical Waves. • True! • Sound is a wave that is created by vibrating objects and propagated through a medium from one location to another. • there is a medium that carries the disturbance from one location to another. Typically, this medium is air, though it could be any material such as water or steel. • there is an original source of the wave, some vibrating object capable of disturbing the first particle of the medium. The disturbance could be created by the vibrating vocal cords of a person, the vibrating string and soundboard of a guitar or violin, the vibrating tines of a tuning fork, or the vibrating diaphragm of a radio speaker. • Since a sound wave is a disturbance that is transported through a medium via the mechanism of particle-to-particle interaction, a sound wave is characterized as a mechanical wave.

  7. Sound Waves, Cont’d.

  8. Mechanical Waves in Action! • http://www.pbs.org/wnet/savageearth/tsunami/index.html • http://www.classzone.com/books/ml_science_share/vis_sim/wslm05_pg18_graph/wslm05_pg18_graph.html

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