What is Vacuum?

All men might have gone through a feeling of ‘nothingness’, atleast once in their lives. “Oh! There’s nothing interesting in it”, “What are you doing now?” “Nothing much!”, “I’m totally bored! Nothing to do” are some sentences we often say ourselves or hear others say. What’s common to all these? Nothing but, ‘nothing’.
The term used to denote ‘nothingness’ in science is vacuum. Put in simple, yet scientifically correct terms, ‘Vacuum is a state with no particles’. So, perfect vacuum means complete absence of particles. It is usually difficult to attain physically. Physically feasible, partial vacuum finds many applications in our everyday lives.

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