When any wire ( or other conducting object such as an antenna ) conducts alternating current, electromagnetic radiation is propagated at the same frequency as the electric current.

When electromagnetic radiation is incident on matter, it causes the charged particles to oscillate and gain energy.

When the current flowing through an inductor changes, creating a time-varying magnetic field inside the coil, a voltage is induced, according to Faraday's law of electromagnetic induction, which by Lenz's law opposes the change in current that created it.

When transformed into Phoenix, Jean's powers escalate to an incalculable level, allowing her to rearrange or disintegrate matter at a subatomic level, fly unaided through space, survive in any atmosphere, and manipulate electromagnetic and cosmic energies for various effects and atmospheric disturbances.

When subjected to an electromagnetic field the paramagnetic particles change spacing, modifying their color and reflective properties.

When this happens due to the presence of the electromagnetic field from a photon, a photon is released in the same phase and direction as the " stimulating " photon, and is called stimulated emission.

When it was found in 1900 by Max Planck that the energy of waves could be described as consisting of small packets or " quanta ", Albert Einstein further developed this idea to show that an electromagnetic wave such as light could be described as a particle ( later called the photon ) with a discrete quantum of energy that was dependent on its frequency.

When wavelengths of electromagnetic radiation are quoted, the wavelength in vacuum usually is intended unless the wavelength is specifically identified as the wavelength in some other medium.

When the propagation speed of these electromagnetic waves was calculated, the speed of light fell out.

When passing through matter, a beta particle is decelerated by electromagnetic interactions and may give off bremsstrahlung x-rays.

When two traces run parallel, an electrical signal in one can be coupled into the other through electromagnetic induction by magnetic field lines from one linking the other ; this is called crosstalk.

" When Earth tries to reclaim the colony, the revolutionaries plan to use in defense a smaller duplicate of the electromagnetic catapult formerly used to export wheat.

When matter and antimatter come into contact, they annihilate — both matter and antimatter are converted directly and entirely into enormous quantities of energy, as electromagnetic radiation.

When the size of the observable universe becomes smaller than any particular structure, no interaction by any of the fundamental forces ( gravitational, electromagnetic, weak, or strong ) can occur between the most remote parts of the structure.

When the Race begins its attack on Earth, they detonate several atomic bombs just above the Earth's atmosphere hoping to disrupt human electronics with the resulting electromagnetic radiation.

When a material is exposed to an ion beam, atomic interactions occur that give off EM radiation of wavelengths in the x-ray part of the electromagnetic spectrum specific to an element.

When calculating the electromagnetic interactions of charged particles, it is tempting to ignore the back-reaction of a particle's own field on itself.

When electrons are accelerated, as occurs when an AC electrical field is impressed on an antenna, they will radiate electromagnetic waves.

When a current passed through the filament, the electromagnetic field would cause the string to move.

When Bell demonstrated his telephone at the Centennial Exhibition in June 1876, he used his improved electromagnetic transmitter, not Gray's water transmitter.

When X-rays are incident on an atom, they make the electronic cloud move as does any electromagnetic wave.

When PD occurs, electromagnetic waves propagate away from the discharge site in all directions.

* When operating in electromagnetic ( Telecoil ) mode, the ratings are from T1 ( worst ) to T4 ( best ).

When it came to deriving the electromagnetic wave equation from displacement current in his 1865 paper A Dynamical Theory of the Electromagnetic Field, he got around the problem of the non-zero divergence associated with Gauss's law and dielectric displacement by eliminating the Gauss term and deriving the wave equation exclusively for the solenoidal magnetic field vector.

When oscillating electric currents flow at the correct voltages within radio antennas, radio waves are generated.

When these vessels of a new model were built, which were intended to " clip " over the waves rather than plough through them, the improved type of craft became known as " clippers " because of their speed.

When waves are added together, their sum is determined by the relative phases as well as the amplitudes of the individual waves so that the summed amplitude of the waves can have any value between zero and the sum of the individual amplitudes.

) When Thomas Young first demonstrated this phenomenon, it indicated that light consists of waves, as the distribution of brightness can be explained by the alternately additive and subtractive interference of wavefronts.

When the two waves are in phase, i. e. the path difference is equal to an integral number of wavelengths, the summed amplitude, and therefore the summed intensity is maximum, and when they are in anti-phase, i. e. the path difference is equal to half a wavelength, one and a half wavelengths, etc., then the two waves cancel and the summed intensity is zero.

When the source of the waves is moving toward the observer, each successive wave crest is emitted from a position closer to the observer than the previous wave.

When a single photon is sent through an interferometer, it passes through both paths, interfering with itself, as waves do, yet is detected by a photomultiplier or other sensitive detector only once.

When EM radiation at the frequences for which it is referred to as " radio waves " impinges upon a conductor, it couples to the conductor, travels along it, and induces an electric current on the surface of the conductor by moving the electrons of the conducting material in correlated bunches of charge.

When processing signals, such as audio, radio waves, light waves, seismic waves, and even images, Fourier analysis can isolate individual components of a compound waveform, concentrating them for easier detection and / or removal.

When the stone hits the surface of the water, a circular pattern of waves appears.

When inserted together with a galvanometer, into a tuned electrical circuit, it could be used as a very sensitive rectifying detector of high frequency wireless currents, known as radio waves.

When he came into view, waves of sound began to build throughout the stadium, rising to a roar, then to a thunder.

When the waves are steep, it may be necessary to sail closer to the wind to avoid waves directly on the beam.

When large tidal flows enter the Strait and the high tide relaxes, internal waves are generated at the Camarinal Sill and proceed eastwards.

When he added cylindrical reflectors behind his dipole antennas, Hertz could detect radio waves about 20 metres from the transmitter in his laboratory.

When this outflow of material eventually impacts the surrounding gas, the shock waves that are created compress and heat the gas.

When a medium is nonlinear, the response to complex waves cannot be determined from a sine-wave decomposition.