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Chapter 25 Introduction to Waves I Waves a disturbance Water is only vibrating in place not moving as it seems due to optical illusion Current moving water occurs when wave meets friction with the shore causing the water to fall Medium any solid liquid or gas Medium that creates the wave does no move with the wave it only vibrates in one place Parts of a Wave Crest highest point of the wave Trough lowest point of the wave Amplitude height of the wave Cycle of wave 1 crest flowed by trough Wavelength distance of one cycle Frequency of cycles per second cycles sec cy sec cps 1 cps 1 Hertz Hz Two Types of Waves 1 Transverse Medium vibrates at right angles to direction of wave ex water light 2 Longitudinal Compression medium vibrates parallel to direction of wave ex sound Interesting Phenomena Shock wave an object moves through medium faster than the wave it makes ex wake of a boat ex crack of a whip Sonic boom shock wave by an object moving faster than sound


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KSU PHY 11030 - Chapter 25: Introduction to Waves I

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