levitation - Move Against Gravity

LEVITATION

Levitation (from Latin levitas "lightness") is that the method by that associate object is suspended by a physical force against gravity, in a very stable position while not solid physical contact. variety of various techniques are developed to levitate matter, together with the mechanics, magnetic, acoustic, magnetism, static, gas film, and optical levitation strategies.

For levitation on Earth, first, a force is needed directed vertically upwards and equal to the attractive force, second, for any tiny displacement of the levitating object, a returning force ought to seem to stabilize it. The stable levitation is naturally achieved by, as an example, magnetic or aerodynamic forces.

Levitation techniques square measure helpful tools in physics analysis. as an example, levitation strategies square measure helpful for high-temperature soften property studies as a result of they eliminate the matter of reaction with containers and permit deep undercooling of melts. The containerless conditions is also obtained by opposing gravity with a levitation force, or by permitting a whole experiment to freefall.

Magnetic levitation:

Although any magnetism force may well be accustomed counteract gravity, maglev is that the most typical. magnetic attraction materials square measure normally used for demonstration functions. during this case the returning force seems from the interaction with the screening currents. as an example, a superconducting sample, which may be thought-about either as an ideal material or associate ideally arduous superconductor, simply levitates in associate close external magnetic flux. The superconductor is initial heated powerfully, then cooled with cryogen to levitate on high of a material. In terribly robust magnetic flux, by means that of magnetic attraction levitation even tiny live animals are levitated.

It is doable to levitate transmutation plumbago by inserting skinny squares of it higher than four cube magnets with the north poles forming one diagonal and south poles forming the opposite diagonal


A magnetically levitated (maglev) train outbound Pudong International airfield on the primary business high-speed magnetic levitation line within the world.

Magnetic levitation is in development to be used for transportation systems. as an example the magnetic levitation transportation includes trains that square measure levitated by a really sizable amount of magnets and, thanks to the dearth of friction on guide rails, they're probably quicker, quieter and electric sander than wheeled mass transit systems