Understanding Waves: Wavelength, Amplitude, Frequency, and Types, Study notes of Anatomy

Download Understanding Waves: Wavelength, Amplitude, Frequency, and Types and more Study notes Anatomy in PDF only on Docsity! Anatomy of a Wave 3/30/16 crest wavelength crest crest Line of - trough wavele ngth -origin— trpugh (2) Sound (2.19) Amplitude Saad Audio Control [Audio enabled peaker © Listener What is • Amplitude? – How high/low the crests/troughs are. • Frequency? – Rate of the wiggle Waves travel Do the wave • Did the wave make it across the room? • Did the people who started it move across the room? • People move up and down as the wave’s energy goes past. Waves carry energy Source, Receiver & Medium • People Wave What is the Source? first person What is the Receiver? last person What is the Medium? all the people Source, Receiver & Medium • Wave on a String What is the Source? Orange Pump What is the Receiver? Clamp What is the Medium? The string of red beads Source, Receiver & Medium • Longitudinal slinky wave What is the Source? start of slinky What is the Receiver? start of slinky What is the Medium? The slinky Sketch what you think the pattern will look like Resonance When an object is driven (wiggled or oscillated) at its natural frequency Resonance When an object is driven (wiggled or oscillated) at its natural frequency Resonance • Swinging http://www.youtube.com/watch?v=I4FPK1oKddQ Pushing to match the natural frequency Resonance • Pasta/raisin demonstration Shaking an object at its natural frequency Reading Quiz • Oscillation – movement back and forth at a regular speed. or Wiggle • Bats are not blind – why do people tell us they are? • Unwanted resonance Engine vibrations can’t match natural frequency of the wings