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Do you know which is the world’s lowest density (lightest) solid?

Oct 19, 2015 11:30 IST

    Q. Do you know which is the world’s lowest density (lightest) solid?

    Ans. The world's lowest density or the lightest solid material is Aerogel which is composed of about  99.98% air by volume. It is usually composed of silica or carbon compounds. It is a synthetic material that is dry, translucent, porous and solid framework of a gel. In general, aerogels are pretty fragile. Due to its appearance and ultra-lightweigth, it is also named 'frozen smoke'.

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