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Oscillations and mechanical waves

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Intuition about simple harmonic oscillatorsDefinition of amplitude and periodEquation for simple harmonic oscillatorsPeriod dependence for mass on springPhase constantPendulums
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Introduction to harmonic motionHarmonic motion part 2 (calculus)Harmonic motion part 3 (no calculus)
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Introduction to wavesProperties of periodic wavesThe equation of a wave
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Production of soundSound Properties: Amplitude, period, frequency, wavelengthSpeed of SoundRelative speed of sound in solids, liquids, and gasesMach numbersDecibel ScaleWhy do sounds get softer?Ultrasound medical imaging
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Doppler effect introductionDoppler effect formula for observed frequencyDoppler effect formula when source is moving awayWhen the source and the wave move at the same velocityDoppler effect for a moving observerDoppler effect: reflection off a moving object
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Wave interferenceConstructive and Destructive interferenceStanding waves on stringsStanding waves in open tubesStanding waves in closed tubesBeat frequencyDerivation of beat frequency formula

About this unit

Waves are responsible for basically every form of communication we use. Whether you're talking out loud, texting on your phone, or waving to someone in a crowd there's going to be a wave transmitting information. Learn about the basics of waves in this topic, then learn more about light waves in the topics below.