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- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Physics_II_(2212)/09%3A_Electromagnetic_Waves/9.02%3A_Electromagnetic_WavesWe see that the magnetic field wave function has the same frequency and wavelength as the electric field wave function, and since the ratio \(\dfrac{T}{\lambda}\) is just the inverse of the speed of t...We see that the magnetic field wave function has the same frequency and wavelength as the electric field wave function, and since the ratio \(\dfrac{T}{\lambda}\) is just the inverse of the speed of the wave \(c\), which means that the amplitudes of the electric and magnetic parts of the wave are related by:
- https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/24%3A_Electromagnetic_Waves/24.01%3A_Maxwells_Equations-_Electromagnetic_Waves_Predicted_and_ObservedElectromagnetic waves consist of oscillating electric and magnetic fields and propagate at the speed of light \(c\). They were predicted by Maxwell, who also showed that \[c = \frac{1}{\sqrt{\mu_{0} \...Electromagnetic waves consist of oscillating electric and magnetic fields and propagate at the speed of light \(c\). They were predicted by Maxwell, who also showed that \[c = \frac{1}{\sqrt{\mu_{0} \epsilon_{0}}},\] where \(mu_{0}\) is the permeability of free space and \(\epsilon_{0}\) is the permitivity of free space. Maxwell’s prediction of electromagnetic waves resulted from his formulation of a complete and symmetric theory of electricity and magnetism, known as Maxwell’s equations.
- https://phys.libretexts.org/Courses/Bowdoin_College/Phys1140%3A_Introductory_Physics_II%3A_Part_1/07%3A_Electromagnetic_Waves/7.03%3A_Plane_Electromagnetic_WavesMechanical waves travel through a medium such as a string, water, or air. Perhaps the most significant prediction of Maxwell’s equations is the existence of combined electric and magnetic (or electrom...Mechanical waves travel through a medium such as a string, water, or air. Perhaps the most significant prediction of Maxwell’s equations is the existence of combined electric and magnetic (or electromagnetic) fields that propagate through space as electromagnetic waves. Because Maxwell’s equations hold in free space, the predicted electromagnetic waves, unlike mechanical waves, do not require a medium for their propagation.
- https://phys.libretexts.org/Courses/Bowdoin_College/Phys1140%3A_Introductory_Physics_II%3A_Part_1/07%3A_Electromagnetic_Waves/7.04%3A_Energy_Carried_by_Electromagnetic_WavesElectromagnetic waves bring energy into a system by virtue of their electric and magnetic fields. These fields can exert forces and move charges in the system and, thus, do work on them. However, ther...Electromagnetic waves bring energy into a system by virtue of their electric and magnetic fields. These fields can exert forces and move charges in the system and, thus, do work on them. However, there is energy in an electromagnetic wave itself, whether it is absorbed or not. Once created, the fields carry energy away from a source. If some energy is later absorbed, the field strengths are diminished and anything left travels on.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/The_Physics_of_Waves_(Goergi)/12%3A_Polarization/12.02%3A_Electromagnetic_WavesThe components, \(\psi_{1}\) and \(\psi_{2}\) go into the the two-dimensional vector, (12.3), that describes the polarization state of the electromagnetic wave, just as it describes the polarization s...The components, \(\psi_{1}\) and \(\psi_{2}\) go into the the two-dimensional vector, (12.3), that describes the polarization state of the electromagnetic wave, just as it describes the polarization state of the string. This is related to the fact that the circularly polarized states carry the maximum angular momentum possible, which in turn is related to the quantum mechanical property of the spin of the photon.
- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electricity_and_Magnetism_(Tatum)/15%3A_Maxwell's_Equations/15.09%3A_Electromagnetic_WavesMaxwell predicted the existence of electromagnetic waves, and these were generated experimentally by Hertz shortly afterwards. In addition, the predicted speed of the waves was \(3 \times 10^{8}\, m ...Maxwell predicted the existence of electromagnetic waves, and these were generated experimentally by Hertz shortly afterwards. In addition, the predicted speed of the waves was \(3 \times 10^{8}\, m \,s^{-1}\), the same as the measured speed of light, showing that light is an electromagnetic wave.
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/20%3A_Maxwell's_Equations/20.06%3A_Plane_Electromagnetic_WavesMechanical waves travel through a medium such as a string, water, or air. Perhaps the most significant prediction of Maxwell’s equations is the existence of combined electric and magnetic (or electrom...Mechanical waves travel through a medium such as a string, water, or air. Perhaps the most significant prediction of Maxwell’s equations is the existence of combined electric and magnetic (or electromagnetic) fields that propagate through space as electromagnetic waves. Because Maxwell’s equations hold in free space, the predicted electromagnetic waves, unlike mechanical waves, do not require a medium for their propagation.
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/22%3A_Generation_and_Detection_of_Electromagnetic_Waves/22.02%3A_Production_of_Electromagnetic_Waves_-_The_AntennaElectromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation. Since the electric and magnetic fields in most electromagn...Electromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation. Since the electric and magnetic fields in most electromagnetic waves are perpendicular to the direction in which the wave moves, it is ordinarily a transverse wave. The strengths of the electric and magnetic parts of the wave are related by \[\frac{E}{B} = c,\] which implies that the magnetic field \(B\) is very weak relative to the electric field \(E\).
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/01%3A_Preliminary_Concepts/1.01%3A_What_is_Electricity_and_MagnetismThis section provides broad definitions of electricity and magnetism and how they are related. It also provides some examples of modern technologies using electricity and magnetism.
- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/09%3A_Electromagnetic_Waves/9.05%3A_Energy_Carried_by_Electromagnetic_WavesFor a plane wave traveling in the direction of the positive x-axis with the phase of the wave chosen so that the wave maximum is at the origin at \(t = 0\), the electric and magnetic fields obey the e...For a plane wave traveling in the direction of the positive x-axis with the phase of the wave chosen so that the wave maximum is at the origin at \(t = 0\), the electric and magnetic fields obey the equations This is possible only if the wave is propagating to the right in the diagram, in which case, the relative orientations show that \(\vec{S} = \frac{1}{\mu_0} \vec{E} \times \vec{B}\) is specifically in the direction of propagation of the electromagnetic wave.
- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/zz%3A_Back_Matter/10%3A_13.1%3A_Appendix_J-_Physics_Formulas_(Wevers)/1.02%3A_Electricity_and_MagnetismElectricity and magnetism from statics to electromagnetic fields as described by Maxwell's equations
