lecture17-waves-

# lecture17-waves- - What you can do so far WAVES Iden6fy the...

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What you can do so far … WAVES Iden6fy the proper6es of a wave What you will be able to do a=er today … transversal vs. longitudinal waves what factors determine wave speed the diFerence between wave speed and par6cle speed Explain … the wave speed the par6cle speed Calculate … describe observa6ons of waves from the ‘real world’ mathema6cally Apply …

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A mechanical wave requires, 1. a medium (gas, liquid or solid) e.g., string, water 1. Medium MUST BE ELASTIC! à a restoring force of some sort brings the medium BACK to equilibrium after it has been disturbed e.g., the tension in a string PULLS the string back to its original position. (why it’s a SINE function and not cosine)
A mechanical wave requires, 1. 2. the particle of medium to interact with each other so that the disturbance can move from one part of the medium to the adjoining part. flickr: unloveablesteve e.g., slinky, string water, light, people

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A mechanical wave requires, 3. A source of disturbance Wavelength Source e.g., stone in water (2D), earthquake (3D), sound (3D) Source flickr: Billtacular What is the separation distance between two adjacent wave fronts?
Mechanical Waves in one dimension Waves on a string (or a rope) Waves on a slinky longitudinal wave: http://www.youtube.com/watch?v=aguCWnbRETU transversal wave: http://www.youtube.com/watch?v=UHcse1jJAto

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wave two types of waves individual particles oscillate perpendicularly to the travelling direction of the wave: String, water, light, etc. Transverse waves
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lecture17-waves- - What you can do so far WAVES Iden6fy the...

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