Vacuum is defined as a space entirely devoid of matter. It is a region where the pressure is significantly lower than atmospheric pressure. This lack of matter allows for the absence of gases, liquids, or solids within that space. In a vacuum, there is no medium for sound or light to travel through.
Some key points to remember about vacuum are:
1. It is often created artificially in various applications such as vacuum tubes, vacuum cleaners, and space simulation chambers.
2. Vacuums are categorized into different types based on the level of pressure, such as low vacuum, high vacuum, ultra-high vacuum, and outer space vacuum.
3. Understanding vacuum is crucial in various scientific fields like physics, chemistry, and engineering.
Overall, vacuum is a space devoid of matter, characterized by low pressure, and plays a significant role in many technological applications and scientific research.
