Waves Section 11.1: The Nature of Waves Page 23 in Notebook.

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Waves Section 11.1: The Nature of Waves Page 23 in Notebook

Waves Waves- repeating disturbance or movement that transfers energy through matter or space Waves- repeating disturbance or movement that transfers energy through matter or space –Ocean waves, light waves, sound waves Energy is transferred from one molecule to a neighboring molecule Energy is transferred from one molecule to a neighboring molecule 7/sci/phys/energy/waves/index.html 7/sci/phys/energy/waves/index.html 7/sci/phys/energy/waves/index.html 7/sci/phys/energy/waves/index.html

Waves Energy travels in a wave, but the matter stays does not move from place to place Energy travels in a wave, but the matter stays does not move from place to place –It may move back and forth but end up in about the same location All waves are produced by vibration All waves are produced by vibration –Up and down motion of your hand holding a rope, vibration of a voice box or speaker, etc.

Waves Medium- the matter through which waves travel Medium- the matter through which waves travel –Can be solid, liquid, gas, or a combination –Ocean waves travel in water Not all waves need a medium- example: electromagnetic waves- light, radio, heat Not all waves need a medium- example: electromagnetic waves- light, radio, heat

Mechanical Waves Mechanical waves- waves that can travel only through matter Mechanical waves- waves that can travel only through matter –Transverse and compressional Transverse waves- matter in the medium moves back and forth at right angles to the direction that the wave travels Transverse waves- matter in the medium moves back and forth at right angles to the direction that the wave travels –Example: ocean waves Compressional Waves- matter in the medium moves in the same direction that the wave travels Compressional Waves- matter in the medium moves in the same direction that the wave travels –Examples: sound waves, a spring that is squeezed and released phys/energy/waves/index.html phys/energy/waves/index.html phys/energy/waves/index.html phys/energy/waves/index.html

Waves Combination- not purely transverse or compressional: water waves, Seismic waves Combination- not purely transverse or compressional: water waves, Seismic waves Water waves- form due to wind blowing across the ocean surface- faster and slower, like a vibration 5/sci/ess/watcyc/wavemotion/index.html Water waves- form due to wind blowing across the ocean surface- faster and slower, like a vibration 5/sci/ess/watcyc/wavemotion/index.html 5/sci/ess/watcyc/wavemotion/index.html 5/sci/ess/watcyc/wavemotion/index.html Size of waves depends on speed, distance, and time of wind blowing Size of waves depends on speed, distance, and time of wind blowing

Ocean Waves: 07/sci/ess/bigwave/index.html Ocean Waves: 07/sci/ess/bigwave/index.html 07/sci/ess/bigwave/index.html 07/sci/ess/bigwave/index.html Seismic Waves: Seismic Waves: 5/sci/ess/earthsys/seismograph/index.html 5/sci/ess/earthsys/seismograph/index.html 5/sci/ess/earthsys/seismograph/index.html 5/sci/ess/earthsys/seismograph/index.html Sound Waves: 6/sci/phys/energy/sound/index.html Sound Waves: 6/sci/phys/energy/sound/index.html 6/sci/phys/energy/sound/index.html 6/sci/phys/energy/sound/index.html