User:John R. Brews/Electromagnetism

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Electromagnetism

Electromagnetism

(CC) Image: John R. Brews Electric motor using a current loop in a magnetic flux density, labeled B     (PD) Image: John R. Brews 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.     (PD) Image: John R. Brews Measuring a length using interference fringes.     (PD) Image: John R. Brews The wavelengths of standing waves in a box that have zero amplitude (nodes) at the walls.     (PD) Image: John R. Brews Measuring a length in wavelengths of light using a Michelson interferometer.     (PD) Image: John R. Brews Boat opposing incoming waves experiences the Doppler effect     (PD) Image: John R. Brews Doppler shift with moving source     (PD) Image: John R. Brews Infinitesimal current elements in two closed current-carrying loops     (PD) Image: John R. Brews Origin at 0, observation point at P, and present position of charge q distant by R from observation point P.     (PD) Image: John R. Brews Top: View of the light beam's path from inside the train. Bottom: View of the light beam's path from outside the train.     (PD) Image: John R. Brews Top: View of the light beam's path from inside the train. Bottom: View of the light beam's path from outside the train.     (PD) Image: John R. Brews Feynman diagram for photon-photon scattering in QED vacuum.