Editing Electromagnetic radiation (section)

=== Maxwell's equations ===
{{Main|Maxwell's equations}}
[[James Clerk Maxwell]] derived a [[Electromagnetic wave equation|wave form of the electric and magnetic equations]], thus uncovering the wave-like nature of [[Electric Field|electric]] and [[magnetic fields]] and their [[Symmetry (physics)|symmetry]]. Because the speed of EM waves predicted by the wave equation coincided with the measured [[speed of light]], Maxwell concluded that light itself is an EM wave.<ref>{{Cite web|url=https://physics.info/em-waves/|title=Electromagnetic Waves|website=The Physics Hypertextbook|last=Elert|first=Glenn|access-date=4 June 2018|archive-date=2 April 2019|archive-url=https://web.archive.org/web/20190402081830/https://physics.info/em-waves/|url-status=live}}</ref><ref>{{Cite web|url=http://www.clerkmaxwellfoundation.org/html/maxwell-s_impact_.html|title=The Impact of James Clerk Maxwell's Work|website=clerkmaxwellfoundation.org|access-date=4 September 2017|url-status=live|archive-url=https://web.archive.org/web/20170917213509/http://www.clerkmaxwellfoundation.org/html/maxwell-s_impact_.html|archive-date=17 September 2017}}</ref> Maxwell's equations were confirmed by [[Heinrich Hertz]] through experiments with radio waves.<ref>{{Cite web|date=18 December 2015|title=Maxwell's equations and the secrets of nature|url=https://plus.maths.org/content/maxwells-equation-and-power-unification|access-date=2 May 2021|website=plus.maths.org|language=en|archive-date=2 May 2021|archive-url=https://web.archive.org/web/20210502084738/https://plus.maths.org/content/maxwells-equation-and-power-unification|url-status=live}}</ref> Out of the four equations, two of the equations that Maxwell refine were [[Electromagnetic induction|Faraday's Law of Induction]] and [[Ampère's circuital law]], which he extended by adding the [[displacement current]] term to the equations himself. Maxwell thought that the displacement current, which he viewed as the motion of bound charges, gave rise to the magnetic field.<ref>{{Cite journal |last=Suárez |first=Álvaro |last2=Martí |first2=Arturo C. |last3=Zuza |first3=Kristina |last4=Guisasola |first4=Jenaro |date=2023-08-17 |title=Electromagnetic field presented in introductory physics textbooks and consequences for its teaching |url=https://link.aps.org/doi/10.1103/PhysRevPhysEducRes.19.020113 |journal=Physical Review Physics Education Research |language=en |volume=19 |issue=2 |doi=10.1103/PhysRevPhysEducRes.19.020113 |issn=2469-9896|hdl=10810/63511 |hdl-access=free }}</ref> The other two equations are [[Gauss's law]] and [[Gauss's law for magnetism]].