Oscillations and Waves Resonance ff 0 Waves Animations
- Slides: 24
Oscillations and Waves
Resonance (f=f 0)
Waves Animations courtesy of Dr. Dan Russell, Kettering University
Wave in a string Animations courtesy of Dr. Dan Russell, Kettering University
Pulsed Sound Wave
Harmonic sound wave
Harmonic sound wave
Harmonic wave Shake end of string up & down with SHM period = T Wave speed wavelength =v =l distance time =v= = V=fl or f=V/ l wavelength period l = = fl T but 1/T=f
Reflection (from a fixed end) Animations courtesy of Dr. Dan Russell, Kettering University
Reflection (from a loose end) Animations courtesy of Dr. Dan Russell, Kettering University
Adding waves pulsed waves Animations courtesy of Dr. Dan Russell, Kettering University
Adding waves Two waves in same direction with slightly different frequencies Wave 1 Wave 2 resultant wave “Beats” Animations courtesy of Dr. Dan Russell, Kettering University
Adding waves harmonic waves in opposite directions incident wave reflected wave resultant wave (standing wave) Animations courtesy of Dr. Dan Russell, Kettering University
Confined waves Only waves with wavelengths that just fit (all others cancel themselves out) in survive
Allowed frequencies l= 2 L f 0=V/l = V/2 L Fundamental tone l=L l=(2/3)L f 1=V/l = V/L=2 f 0 1 st overtone f 2=V/l=V/(2/3)L=3 f 0 2 nd overtone l=L/2 f 3=V/l=V/(1/2)L=4 f 0 3 rd overtone l=(2/5)L f 4=V/l=V/(2/5)L=5 f 0 4 th overtone
Ukuleles, etc L l 0 = L/2; f 0 = V/2 L l 1= L; f 1 = V/L =2 f 0 l 2= 2 L/3; f 2 = 3 f 0 l 3= L/2; f 3 = 4 f 0 Etc… (V depends on the Tension & thickness Of the string)
Doppler effect
Sound wave stationary source Wavelength same in all directions
Sound wave moving source Wavelength in forward direction is shorter (frequency is higher) Wavelength in backward direction is longer (frequency is higher)
Waves from a stationary source Wavelength same in all directions
Waves from a moving source v Wavelength in forward direction is shorter (frequency is higher) Wavelength in backward direction is longer (frequency is higher)
surf
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Confined waves
- Elasticity and oscillations
- Electromagnetic oscillations and alternating current
- Electromagnetic oscillations and alternating current
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- Baryon acoustic oscillations
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- Baryon acoustic oscillations
- Baryon acoustic oscillations
- Baryonic acoustic oscillations
- Coupled oscillations
- Slow oscillations
- Coupled oscillations
- Free electron model of metals
- Plasma oscillations
- Lotka-volterra predator-prey model
- Compare and contrast p waves and s waves using venn diagram
- Mechanical waves and electromagnetic waves similarities
- Mechanical wave
- Similarities of mechanical waves and electromagnetic waves