Fill smoke from an incense stick in the glass barrel of a 20-ml syringe. Now shut the outlet and push in the plunger. The smoke will now be pushed into a small volume -- its density will increase and it will appear milky. On pulling out the plunger the same volume will be spread and the smoke will become transparent.
http://arvindguptatoys.com/toys/Reducevolumeincreasedensity.html This work was supported by IUCAA and Tata Trust. This film was made by Ashok Rupner TATA Trust: Education is one of the key focu
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