Cheshire Cat

Return to Refraction and Dispersion

Description:

This demo consists of a watchglass on which a cat has been etched, with a smile penned in with permanent marker. Put on the overhead and pour special oil over the cat; the cat shape disappears and all that can be seen is the smile.

This demo must be used with the special oil that has the same index of refraction as glass

Location:

• Cheshire Cat: Drawer
• Special Oil: Drawer or Under Fume Hood.