THIS DAY IN SCIENCE: Rideau Canal - Construction Begins in 1826

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Teacher Demo/Student Activity: Disappearing Beaker


This demonstration will amaze and astound! As you pour vegetable oil into a small Pyrex beaker placed inside a larger Pyrex beaker, the smaller beaker will magically disappear! This happens because Pyrex and the oil have a similar index of refraction.  The straw and water in this image, however, don’t. This activity can be a teacher demo or a student activity.

Click here to download complete activity….

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