Poincaré`s Light - Séminaire Poincaré

... in the second the elastic constant is the same. The second option was by far the most popular for at least three reasons: it implied a more familiar kind of elasticity; it bore the stamp of Fresnel’s authority; it permitted a simple interpretation of the Fresnel drag, as we will see in a moment. Yet ...

... in the second the elastic constant is the same. The second option was by far the most popular for at least three reasons: it implied a more familiar kind of elasticity; it bore the stamp of Fresnel’s authority; it permitted a simple interpretation of the Fresnel drag, as we will see in a moment. Yet ...

32 From Galileo to Lorentz transformations

... 32.3: Galileo transformations of space-time coordinates and Newtonian mechanics When is an object subject to no force? Experience shows that all known real forces are due to the existence of something which is the source of the force and that the intensity of all real forces decreases when increasin ...

... 32.3: Galileo transformations of space-time coordinates and Newtonian mechanics When is an object subject to no force? Experience shows that all known real forces are due to the existence of something which is the source of the force and that the intensity of all real forces decreases when increasin ...

Electromagnetic force on a magnetic dipole inside

... the axisymmetry no electric potential must be computed and the Lorentz force can be explicitly represented as a function of all relevant parameters. Moreover, the analytic model turns out to be in very good agreement with a laboratory experiment and the results can be compared with the above-mention ...

... the axisymmetry no electric potential must be computed and the Lorentz force can be explicitly represented as a function of all relevant parameters. Moreover, the analytic model turns out to be in very good agreement with a laboratory experiment and the results can be compared with the above-mention ...

Speed of light - should be measured once again

... condition (14) is not exactly fulfilled is, namely, appreciably larger than that in experiments using visible light. Nevertheless, just on the basis of the substantial agreement between the magnitudes of c and b Maxwell proposed (not without skepticism and in understandable ignorance of the facts ju ...

... condition (14) is not exactly fulfilled is, namely, appreciably larger than that in experiments using visible light. Nevertheless, just on the basis of the substantial agreement between the magnitudes of c and b Maxwell proposed (not without skepticism and in understandable ignorance of the facts ju ...

The Lorentz Force and the Radiation Pressure of Light

... therefore exerts a radiation pressure on matter. This is not controversial: Maxwell himself in his Treatise on Electricity and Magnetism[1] recognized that light should manifest a radiation pressure, but his demonstration is not immediately transparent to modern readers. At least two contemporary te ...

... therefore exerts a radiation pressure on matter. This is not controversial: Maxwell himself in his Treatise on Electricity and Magnetism[1] recognized that light should manifest a radiation pressure, but his demonstration is not immediately transparent to modern readers. At least two contemporary te ...

Lorentz Force Effects on the Orbit of a Charged Artificial Satellite: A

... had considerable effect on the spacecraft potential due to magnetic field confinement of the electrons as well as to the (Lorentz force) V×B electric field resulting from the movement of the spacecraft across magnetic field lines. They derived an algorithm for determining the spacecraft potential (a ...

... had considerable effect on the spacecraft potential due to magnetic field confinement of the electrons as well as to the (Lorentz force) V×B electric field resulting from the movement of the spacecraft across magnetic field lines. They derived an algorithm for determining the spacecraft potential (a ...

Moving from Newton to Einstein

... If you ask a random collection of first year students, “What do you know about relativity?” the answers might be: “All is relative?” “It all depends on your frame of reference.” “You will never measure an absolute velocity unless you look into space.” “Wasn’t it invented by the same guy that gave us ...

... If you ask a random collection of first year students, “What do you know about relativity?” the answers might be: “All is relative?” “It all depends on your frame of reference.” “You will never measure an absolute velocity unless you look into space.” “Wasn’t it invented by the same guy that gave us ...

Example: The Lorentz Force Law

... During the summer of 1921 (he was 15!), Farnsworth was leading a horsedrawn plowing machine when he stopped to look over his work. He suddenly realized that just as he was plowing the field into parallel rows, he could scan an image row by row. He figured that by doing this one line at a time, with ...

... During the summer of 1921 (he was 15!), Farnsworth was leading a horsedrawn plowing machine when he stopped to look over his work. He suddenly realized that just as he was plowing the field into parallel rows, he could scan an image row by row. He figured that by doing this one line at a time, with ...

relativity phys311

... Our (possibly inherited) lack of appreciation that the world of the very fast and the world of the very small may well be very different from the world we are used to makes modern physics difficult to comprehend, but Heisenberg showed the way, see above, we have to stick to the mathematical schemes ...

... Our (possibly inherited) lack of appreciation that the world of the very fast and the world of the very small may well be very different from the world we are used to makes modern physics difficult to comprehend, but Heisenberg showed the way, see above, we have to stick to the mathematical schemes ...

When and Where is a Current Electrically Neutral?

... in S’ they are Lorentz contracted by a gamma factor dependent on v2. This means that the plus ions are bunched together a bit, so that their density is increased. The result is a net preponderance of positive charge in the wire, so that it ceases to be electrically neutral. Consequently a non-vanish ...

... in S’ they are Lorentz contracted by a gamma factor dependent on v2. This means that the plus ions are bunched together a bit, so that their density is increased. The result is a net preponderance of positive charge in the wire, so that it ceases to be electrically neutral. Consequently a non-vanish ...

Relativistic Effects - The Physics of Bruce Harvey

... practice is to turn the fraction upside down and define the factor "gamma" which describes the effect on mass which is increased to 54 of its original mass: The Lorentz contraction is described by the fraction 1 ...

... practice is to turn the fraction upside down and define the factor "gamma" which describes the effect on mass which is increased to 54 of its original mass: The Lorentz contraction is described by the fraction 1 ...

# Modern searches for Lorentz violation

Modern searches for Lorentz violation are scientific studies that look for deviations from Lorentz invariance or symmetry, a set of fundamental frameworks that underpin modern science and fundamental physics in particular. These studies try to determine whether violations or exceptions might exist for well-known physical laws such as special relativity and CPT symmetry, as predicted by some variations of quantum gravity, string theory, and some alternatives to general relativity.Lorentz violations concern the fundamental predictions of special relativity, such as the principle of relativity, the constancy of the speed of light in all inertial frames of reference, and time dilation, as well as the predictions of the standard model of particle physics. To assess and predict possible violations, test theories of special relativity and effective field theories (EFT) such as the Standard-Model Extension (SME) have been invented. These models introduce Lorentz and CPT violations through spontaneous symmetry breaking caused by hypothetical background fields, resulting in some sort of preferred frame effects. This could lead, for instance, to modifications of the dispersion relation, causing differences between the maximal attainable speed of matter and the speed of light.Both terrestrial and astronomical experiments have been carried out, and new experimental techniques have been introduced. No Lorentz violations could be measured thus far, and exceptions in which positive results were reported have been refuted or lack further confirmations. For discussions of many experiments, see Mattingly (2005). For a detailed list of results of recent experimental searches, see Kostelecký and Russell (2008–2013). For a recent overview and history of Lorentz violating models, see Liberati (2013). See also the main article Tests of special relativity.