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1:44
YouTube
MEL Chemistry
DIY optical illusions
Awesome optical experiments with water and oil! Equipment: glass, water, vegetable oil, drawings. Place a coin in a cup so that it isn't in your line of sight. Just add water, and the coin will appear! Draw two horizontal arrows pointing in opposite directions. Place an empty glass in front of them. Fill the glass with water – the arrows ...
28.2K views
Sep 10, 2019
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