Who invented Vacuum?
Generally when there is nothing then we call it as vacuum. But earlier nobody knew much about vacuum. There were so many experiments done to prove vacuum in scientific way. In 1643 a scientist Evangelista Torricelli filled the mercury in slim glass tube and he closed the end with his finger. He reversed the glass tube, but the mercury did not move. Also there existed a gap between finger and mercury. The empty place which resists the mercury to not come to out is called as ‘vacuum’.
From childhood Torricelli was interested in scientific research and in Maths. Galileo appointed him as his assistant by observing his interest in experiments. In that time by doing experiments Tareselli discovered the ‘vacuum’ state. He also observed that this vacuum is always not in the same way it is often changing.