His research also involved the study of auroral phenomena, which he conducted with his assistant Olof Hiorter, and he was the first to suggest a connection between the aurora borealis and changes in the magnetic field of the Earth.

On the other hand, in measurements of electromagnetic phenomena ( involving units of charge, electric and magnetic fields, voltage, and so on ), converting between CGS and SI is much more subtle and involved.

The active regions involve all the phenomena directly linked to the magnetic field, which occur at different heights on the Sun's surface: sunspots and faculae, happening in the photosphere, spicules, Hα filaments and plages in the chromosphere, prominences in the chromosphere and transition region, and flares and coronal mass ejections happening in the corona and chromosphere, but if flares are very violent can perturb also the photosphere and generate a Moreton wave, as described by Uchida.

The word is a compound from two Greek terms, ἢλεκτρον, ēlektron, " amber " ( as electrostatic phenomena were first described as properties of amber by the philosopher Thales ), and μαγνήτης, magnētēs, " magnet " ( the magnetic stones found in antiquity in the vicinity of the Greek city of Magnesia, in Lydia, Asia Minor ).

The recognition of electromagnetism, the unity of electric and magnetic phenomena, is due to Hans Christian Ørsted and

Although he rejected the transcendental / metaphysical interpretation given to these phenomena outright, Braid accepted that these accounts of Oriental practices supported his view that the effects of hypnotism could be produced in solitude, without the presence of any other person ( as he had already proved to his own satisfaction with the experiments he had conducted in November 1841 ); and he saw correlations between many of the " metaphysical " Oriental practices and his own " rational " neuro-hypnotism, and totally rejected all of the fluid theories and magnetic practices of the mesmerists.

I do not allege that this condition is induced through the transmission of a magnetic or occult influence from my body into that of my patients ; nor do I profess, by my processes, to produce the higher supernatural phenomena of the Mesmerists.

On obtaining a value that was close to the speed of light as measured by Fizeau, Maxwell concluded that light consists in undulations of the same medium that is the cause of electric and magnetic phenomena.

Two physical phenomena which are described by classical fields are Newtonian gravitation, described by Newtonian gravitational field g ( x, t ), and classical electromagnetism, described by the electric and magnetic fields E ( x, t ) and B ( x, t ).

Manifesting intense magnetic activity, sunspots host secondary phenomena such as coronal loops ( prominences ) and reconnection events.

This was the first indication that sunspots were basically magnetic phenomena, which appeared in pairs that corresponded with two magnetic poles of opposite polarity.

On longer time scales, such as the solar cycle, other magnetic phenomena ( faculae and the chromospheric network ) do correlate with sunspot occurrence.

Tape bias is the term for two phenomena, DC bias and AC bias, that improve the fidelity of analogue magnetic tape sound recordings.

Albert Einstein, in his paper of 1905 that established relativity, showed that both the electric and magnetic fields are part of the same phenomena viewed from different reference frames.

That is, the electric and magnetic fields are not completely separate phenomena ; what one observer perceives as an electric field, another observer in a different frame of reference perceives as a mixture of electric and magnetic fields.

Newton's law of universal gravitation follows an inverse-square law, as do the effects of electric, magnetic, light, sound, and radiation phenomena.

A magneto-optic effect is any one of a number of phenomena in which an electromagnetic wave propagates through a medium that has been altered by the presence of a quasistatic magnetic field.

Resonance phenomena occur with all types of vibrations or waves: there is mechanical resonance, acoustic resonance, electromagnetic resonance, nuclear magnetic resonance ( NMR ), electron spin resonance ( ESR ) and resonance of quantum wave functions.

However, many geophysical phenomena – such as the Earth's magnetic field and earthquakes – have been investigated since the ancient era.

It is distinct from the concept of weather within a planetary atmosphere, and deals with phenomena involving ambient plasma, magnetic fields, radiation and other matter in space ( generally close to Earth but also in interplanetary, and occasionally interstellar medium ).

... magnetic, auroral and meteorological observations at a network of stations in the Arctic and Antarctic would materially advance present knowledge and understanding ( of these phenomena ) not only within polar regions but in general ...

Cyclotron radiation from plasma in the interstellar medium or around black holes and other astronomical phenomena is an important source of information about distant magnetic fields.

Another oft-cited example is Maxwell's equations, derived to model the elementary electrical and magnetic phenomena known as of the mid 19th century.

The next important step in understanding superconductivity occurred in 1933, when Meissner and Ochsenfeld discovered that superconductors expelled applied magnetic fields, a phenomenon which has come to be known as the Meissner effect.

Ground-based data obtained during IGY demonstrated that the aurora occurred in an auroral oval, a permanent region of luminescence 15 to 25 degrees in latitude from the magnetic poles and 5 to 20 degrees wide.

The first occurred was the late 1970s when there were a number of unsolved problems such as the horizon problem, the flatness problem, and the lack of magnetic monopoles challenged the big bang model.

During the first stages of deployment, if a fraudulent magnetic swipe card transaction was deemed to have occurred, the retailer was refunded by the issuing bank, as was the case prior to the introduction of Chip and PIN.

This induction was due to the change in magnetic flux that occurred when the battery was connected and disconnected.

( Note: According to the book Sir Alfred Ewing: A Pioneer in Physics and Engineering ( 1946 ) by Professor Bates, the discovery of magnetic hysteresis probably occurred before Ewing.

Volcanism was excluded because there were no magnetic anomalies in the crater, which would be expected if eruptions had occurred there.

The next important step in understanding superconductivity occurred in 1933, when Meissner and Ochsenfeld discovered that superconductors expelled applied magnetic fields, a phenomenon that has come to be known as the Meissner effect.

From this addendum, it is clear that Richard Carrington was not willing to commit professionally to connecting the magnetic disturbance with the event he had observed on the surface of the sun even though they occurred at nearly identical times.

Stewart also reported on the magnetic disturbance that occurred at the same time as the event observed by Richard Carrington.

Continuous motion of the arc contact area at the anode by flow or magnetic forces.

The reference he used to this effect was the Earth's magnetic field direction, which at that time was believed to be invariant.

An alternating magnetic field is applied at the atomizer ( graphite furnace ) to split the absorption line into three components, the π component, which remains at the same position as the original absorption line, and two σ components, which are moved to higher and lower wavelengths, respectively ( see Zeeman Effect ).

In AC circuits, a current transformer converts the magnetic field around a conductor into a small AC current, typically either or at full rated current, that can be easily read by a meter.

In addition, a rotation axis at an angle to the magnetic axis may be spinning different bands of magnetically-sorted elements into the line of sight between Alioth and the Earth.

With Alioth, the rotational and magnetic axes are at almost 90 degrees to one another.

Auerbach discusses his work at Burroughs 1949 – 1957 managing development for the SAGE project, BEAM I computer, the Intercontinental Ballistic Missile System, a magnetic core encryption communications system, and Atlas missile.

In 1879, Edwin Herbert Hall working at the Johns Hopkins University discovered the development of a voltage across conductors transverse to an electric current in the conductor and magnetic field perpendicular to the current.

The first attempt at a microscopic description of magnetism was by Wilhelm Lenz and Ernst Ising through the Ising model that described magnetic materials as consisting of a periodic lattice of quantum spins that collectively acquired magnetization.

; Cardiovascular magnetic resonance imaging ( CMR ): Magnetic resonance imaging ( MRI ) of the heart that utilizes the ECG for gating and to look at specific mechanical functions of the heart.

Chromium is remarkable for its magnetic properties: it is the only elemental solid which shows antiferromagnetic ordering at room temperature ( and below ).

Whereas it is paramagnetic at ambient conditions, it becomes antiferromagnetic upon cooling, and other magnetic transitions are also observed for many curium compounds.

The theory of Special Relativity allows one to transform the magnetic field into a static electric field for an observer moving at the same speed as the charge in the diagram.

Although water is vital for life, the structure of this water in the cytosol is not well understood, mostly because methods such as nuclear magnetic resonance only give information on the average structure of water, and cannot measure local variations at the microscopic scale.

About an hour after fragment K entered Jupiter, observers recorded auroral emission near the impact region, as well as at the antipode of the impact site with respect to Jupiter's strong magnetic field.

The reference he used to this effect was the Earth's magnetic field direction, which at that time was believed to be invariant.

Nanoparticles made of magnetic material can also be used to concentrate agents at tumour sites using an externally applied magnetic field.

The solar cycle spans approximately 11 years, from solar minimum to solar maximum, where the solar magnetic field is continually wound up ( due to a differential rotation at the solar equator ; the equator rotates quicker than the poles ).

Sunspot activity will be more pronounced at solar maximum where the magnetic field is twisted to a maximum.

Dysprosium and holmium have the highest magnetic strengths of the elements, especially at low temperatures.

Due to the high carrier concentration, tunnel diodes are very fast, may be used at low ( mK ) temperatures, high magnetic fields, and in high radiation environments.

In most materials diamagnetism is a weak effect, but in a superconductor a strong quantum effect repels the magnetic field entirely, apart from a thin layer at the surface.