lecture19-waves-phase constant

# lecture19-waves-phase constant - What you can do so far...

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What you can do so far … WAVES Iden6fy the components of the wave equa6on What you will be able to do a?er today … which variables you can iden6fy from a snapshot graph and a history graph in which direc6on a wave is moving Explain … the phase constant, φ 0 Calculate … graph a history graph from a series of snapshots Apply …

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in-class worksheet How do you know WHICH direction the wave is moving? generate a SERIES of snapshots graphs and then chose ONE point to make a HISTORY graph. snapshot graph at t = 0s
A wave traveling towards positive x axis (increasing x ) (, 0 ) s i n ( ) M Dx D kx = v xx t →− ) s i n (( ) ) v M Dxt D k xt = v k t t ω = ) s i n ( ) M t D k x t = v

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A wave traveling towards negative x axis (decreasing x ) v (, 0 ) s i n ( ) M Dx D kx = v xx t + ) s i n (( ) ) v M Dxt D k xt + = v k t t ω += + ) s i n ( ) M t D k x t =+
Introducing a phase constant A snapshot of two identical waves at t = 0 0 (, ) s i n ( ) M Dxt D kx t ωφ = 0 φ x D ( x,0 )

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in-class worksheet
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## This note was uploaded on 01/15/2012 for the course PHYS 101 taught by Professor Bates during the Winter '08 term at The University of British Columbia.

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lecture19-waves-phase constant - What you can do so far...

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