The Care And Feeding Of Ripple Tanks (Part One)

e=mc2andallthat

And so they’re back — ripple tanks, that is. And a Required Practical to boot!

They were a staple of Physics teaching when I started my career, but somehow they fell into an undeserved desuetude. I know many fine teachers and excellent technicians who have never used one in anger, which is a real pity, since they are a great teaching tool.

So I present here my eclectic mix of ripple tanks: what you really need to know.

The Basics: “Look at the shadows, honey, look at the shadows!”

A ripple tank is simply a container with a transparent base. The idea is to put water in the container and make waves or ripples in the water. A light source is positioned above the water so that a screen underneath the transparent tank is illuminated. The crests and troughs act as converging and diverging lenses and produce a pattern of…

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About e=mc2andallthat

Gethyn Jones BSc, PGCE, MCCT is a physics teacher of over 29 years experience who still enjoys teaching (well, most of the time anyway). He lives in London with his lovely wife and two rescue cats. Please follow him on Twitter @emc2andallthat
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