View source for User:John R. Brews/Electromagnetism

==Electromagnetism==
{{Gallery-mixed
|caption=Electromagnetism
|width=200
|lines=5
|Motor.PNG|Electric motor using a current loop in a [[magnetic induction|magnetic flux density]], labeled '''''B'''''
|Fizeau apparatus.PNG|The Fizeau apparatus for measuring the speed of light by passing it between the cogs of a rotating gear and reflecting it back through adjacent cogs.
|Interferometer.PNG|Measuring a length using interference fringes.
|Waves in a box.PNG|The wavelengths of standing waves in a box that have zero amplitude (nodes) at the walls.
|Michelson interferometer.PNG|Measuring a length in wavelengths of light using a [[Michelson interferometer]].
|Doppler effect.PNG|Boat opposing incoming waves experiences the Doppler effect 
|Doppler with moving source.PNG|Doppler shift with moving source
|Current elements.PNG|Infinitesimal current elements in two closed current-carrying loops
|Lienard-Wiechert coordinates.PNG|Origin at ''0'', observation point at ''P'', and present position of charge ''q'' distant by ''R'' from observation point ''P''.
|Light path.png|''Top'': View of the light beam's path from inside the train. ''Bottom'': View of the light beam's path from outside the train.

}}