Amplifying waves

A pier full of sail boats, perpendicular to the prevailing wave direction, and voila: Instant demonstration of an amplified wave!

Screen shot 2015-09-26 at 5.06.57 PM
Ratzeburg 2015

Look at how the masts show a transversal wave:

Maybe consider bringing this video as a backup when you are not sure whether your class will be able to do this visualization of transversal waves and calm back down again :-)

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