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• 11:04, 25 April 2022 Physdemo talk contribs created page Cheshire Cat (Created page with "{{NewDemo|subject=Light and Optics|topic=Refraction and Dispersion|file1=cheshirecat.GIF}} 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 mineral oil over the cat; the cat shape disappears and all that can be seen is the smile. '''Location: ''' * Shelf M-3 *")