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Displacement of a point on a progressive wave

  • #1

Homework Statement


upload_2015-5-30_14-44-32.png

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Homework Equations




The Attempt at a Solution


I wrote that Y will have a negative displacement, before returning to equilibrium. Why is Y's displacement positive instead?
 

Answers and Replies

  • #2
This wave travelling to "+" or right direction so the wave function is: ## \Psi(x,k) = A\sin(\omega{t} - kx) ##.
Simpler, imagine the wave curve travelling to the right.
 

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