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Waves Longitudinal and Transverse Waves Transverse Waves on Strings Periodic Waves Reflection and Refraction of Waves Interference and Diffraction Standing

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  • Waves Longitudinal and Transverse Waves Transverse Waves on Strings Periodic Waves Reflection and Refraction of Waves Interference and Diffraction Standing Waves on a String
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  • Mechanical Waves : Electromagnetic Waves : Matter Waves : Transverse : string wave Longitudinal : sound wave
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  • (Transverse Wave)
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  • (Longitudinal Wave)
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  • wavelength & frequency
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  • (amplitude) (phase) (wavelength) (angular wave number) (period) (angular frequency) (frequency)
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  • + is used for a wave traveling in the x direction, and is used for a wave traveling in the +x direction. is called the wave number. Note: it would also be valid to use the sine function in the above description. is called the phase.
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  • vs
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  • (Superposition)
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  • (Reflection)
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  • (Refraction)
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  • (Interference)
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  • (Difraction)
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  • (Standing Waves)
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  • : :
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  • Sound Waves The Speed of Sound Amplitude & Intensity of Sound Waves Standing Sound Waves Beats The Doppler Effect Shock Waves Echolocation
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  • 20 Hz 20,000 Hz. , 20,000 Hz ; 20 Hz .
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  • , . , , . , , .
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  • .
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  • (0C, 1 atm ) (m/s) 259 343 972 1284 1450 1493 1570 3100 5790 6500
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  • Amplitude & Intensity
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  • (Decibel) ( ); ( bel ), ( , dB). ( 10 ) , 0 dB.
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  • . .
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  • ( ), .
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  • ( )
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  • , . .
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  • ( )
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  • (Timbre) . . , , ( ). ( ) , ( Fourier analysis). , , ( Fourier synthesis).
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  • Flute, Oboe, Saxophone
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  • (Loudness) , . 3 4 kHz , 10 kHz 800Hz .
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  • (Beats) ( ), , . . , 15Hz ; 15Hz , . .
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  • (Doppler Effect) , , . , , , .
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  • , , . (12-14)
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  • (Shock Waves) , , . , , .
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  • (a) (b) (c)
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  • (Echolocation) . , . (sonar), .
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