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Levitation (on Earth or any planetoid) requires an upward force that cancels out the weight of the object, so that the object does not fall (accelerate downward) or rise (accelerate upward). For positional stability, any small displacement of the levitating object must result in a small change in force in the opposite direction.
Diamagnetism is the property of materials that are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force.
Levitation is the process by which an object is held aloft, without mechanical support, in a stable position. This category is for articles directly related to the physics and science of physical (non- illusionary ) levitation (i.e.: magnetic levitation ).
The applications of photophoresis expand into the various divisions of science, thus physics, chemistry as well as in biology. Photophoresis is applied in particle trapping and levitation, [3] in the field flow fractionation of particles, [4] in the determination of thermal conductivity and temperature of microscopic grains [5] and also in the transport of soot particles in the atmosphere. [6]
The Meissner effect - The Feynman Lectures on Physics Meissner Effect (Science from scratch) Short video from Imperial College London about the Meissner effect and levitating trains of the future. Introduction to superconductivity Video about Type 1 Superconductors: R = 0/Transition temperatures/ B is a state variable/Meissner effect/Energy gap ...
Magnetic levitation can be stabilised using different techniques; here rotation (spin) is used. Magnetic levitation (maglev) or magnetic suspension is a method by which an object is suspended with no support other than magnetic fields. Magnetic force is used to counteract the effects of the gravitational force and any other forces. [2]
Acoustic levitation is a method for suspending matter in air against gravity using acoustic radiation pressure from high intensity sound waves. [1] [2]It works on the same principles as acoustic tweezers by harnessing acoustic radiation forces.
Electrostatic levitation is the process of using an electric field to levitate a charged object and counteract the effects of gravity. It was used, for instance, in Robert Millikan 's oil drop experiment and is used to suspend the gyroscopes in Gravity Probe B during launch.