Waves and Sounds!

• Transverse waves are waves that oscillate perpendicular to the direction of energy transfer.
• Longitudinal waves have a vibrating particle that oscillates parallel to the direction of the wave.
• Longitudinal waves are series of compressions and refractions
• Sound waves are a type of longitudinal waves
• frequency is the number of cycles per second of a wave (Hz)
• Transverse wave produce a series of crests and troughs
• Constructive interference if a wave results in an amplitude GREATER than the amplitude of either wave.
• Constructive interference results in a SUPERCREST which is double the amplitude/height of the original wave
• Destructive interferences results in an amplitude that is SMALLER than wither amplitude caused by either wave
• Destructive interference results in a node point
• At a fixed end waves are reflected at the boundary

  • Crest --> trough
  • Trough --> crest
• At a free end waves keep their phase
• A standing wave pattern is a series of nodes and loops
• Humans are responsive to frequencies in the range of 20-20000Hz
• Sound CAN'T travel in vacuum such as space! It requires a medium to be transmitted
• Sounds travels fastest in solids, medium in liquids, and slowest in gases
• Resonance is the natural frequency if an object that when subjected to, will vibrate with an abnormally large amplitude