Physics, Fun and Beyond: Electrifying Projects and Inventions from Recycled and Low-Cost Materials

Playing with Light: Optics

1 Invisible Glass

See how you can make a bottle invisible!

Supplies

• smooth, transparent drinking glass (not colored)

• 2 or 3 tubes of glycerin (100 ml, found at pharmacies)

• empty bottle of Tabasco, or other narrow transparent glass bottle, very clean and dry, with a screw-on top

• PVC pipe

• piece of paneling

• superglue

Step By Step

Fill up the bottle with glycerin and screw the lid on tightly. Fill about one-third of the glass with glycerin. Slowly place the bottle in the glass. A part of the bottle will be submerged. What happens to this part? Why? What will happen if you place the bottle with glycerin in ...