The setup involved a measuring cylinder full of glycerin; with a pyrex test tube; also full of glycerin; which could be lowered into and lifted out of the cylinder (via a string looped around a bung pushed into the tube).
The Disappearing Test Tube - Group Activity
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A great experiment to use when teaching waves. The worksheet included also raises some good questions for pupils. I especially liked the take on the invisible man!!
SML Member
January 06, 2012
