LIGHT THAN AIR Meaning and
Definition
-
"Lighter than air" refers to an object or substance that has a density lower than that of the surrounding air, allowing it to float or remain suspended in the atmosphere. This term is commonly used to describe balloons, airships, and other similar forms of aerostats that can ascend and maintain flight by utilizing the principle of buoyancy.
In order for an object to be classified as "lighter than air," it needs to be less dense than the air it displaces. This is achieved by either using lighter materials, such as fabrics or lightweight metals, or by filling the object with a gas that has lower density than ordinary air, typically hydrogen or helium. As a result, the overall weight of the object is less than the buoyant force exerted by the air, allowing it to rise and remain afloat.
The concept of being "lighter than air" has been utilized for various purposes throughout history, from aerial transportation and scientific research to recreational activities and advertising. Examples of lighter-than-air aircraft include hot air balloons, blimps, dirigibles, and zeppelins. These vehicles can be steered and controlled by adjusting the amount of lifting gas or by using propulsion systems.
Overall, the term "lighter than air" denotes the ability of an object to float or fly by displacing air due to its lower density. This principle has led to advancements in aviation and continues to be a significant aspect of various applications that involve airborne vehicles or structures.
