# Speed of light/Related Articles

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*See also changes related to Speed of light, or pages that link to Speed of light or to this page or whose text contains "Speed of light".*

## Parent topics

## Subtopics

- Atomic units [r]: A system of units convenient for atomic and molecular calculations.
^{[e]} - Frame of reference (physics) [r]: An observational set of coordinates tied to the motion of an observer, used to describe physical events and possibly including a measurement apparatus.
^{[e]} - Inertial frame of reference [r]: A frame of reference in which the laws of physics take their simplest form.
^{[e]} - Free space (electromagnetism) [r]: In classical electromagnetism, the vacuum reference state with no fields or particles; in quantum mechanics, the vacuum state with electromagnetic fields fluctuating about an average value of zero.
^{[e]} - Vacuum (quantum electrodynamic) [r]: The term
*quantum electrodynamic vacuum*, or QED vacuum, refers to the ground state of the electromagnetic field, which is subject to fluctuations about a dormant zero average-field condition.^{[e]} - Metre (unit) [r]: Unit of length; one of the seven SI base units.
^{[e]} - Second (physics) [r]: Unit of time; one of the seven SI base units.
^{[e]} - Time [r]: A fundamental quantity in physics - that what differs always between two inspections of the same system by the same observer.
^{[e]}

## Bot-suggested topics

Auto-populated based on Special:WhatLinksHere/Speed of light. Needs checking by a human.

- Albert Einstein [r]: 20th-century physicist who formulated the theories of relativity.
^{[e]} - Biot-Savart's law [r]:
*Add brief definition or description* - Black hole [r]: Area of space-time with a gravitational field so intense that its escape velocity is equal to or exceeds the speed of light.
^{[e]} - Christiaan Huygens [r]: (14 April 1629 - 8 June 1695) an internationally renowned Dutch mathematician, physicist and astronomer.
^{[e]} - Displacement current [r]: Time derivative of the electric displacement
**D**; Maxwell's correction to Ampère's law.^{[e]} - Electric constant [r]: A physical constant in the International System of Units (SI) relating capacitance to area in classical vacuum with an exact value
*ε*= 10_{0}^{7}/(4πc_{0}^{2}) F/m,*c*being the defined value for the speed of light in classical vacuum in the SI units._{0}^{[e]} - Electric field [r]: force acting on an electric charge—a vector field.
^{[e]} - Electromagnetic radiation [r]: a collection of electromagnetic waves, usually of different wavelengths.
^{[e]} - Electromagnetic spectrum [r]: The range of electromagnetic waves covering all frequencies and wavelengths.
^{[e]} - Electromagnetic wave [r]: A change, periodic in space and time, of an electric field
**E**(**r**,t) and a magnetic field**B**(**r**,t); a stream of electromagnetic waves, referred to as electromagnetic radiation, can be seen as a stream of massless elementary particles, named photons.^{[e]} - Ether (physics) [r]: Medium that can carry electromagnetic waves (obsolete)
^{[e]} - Frequency [r]: For a periodic (i.e., repeating) phenomena, the number of repetitions per unit of time, usually one second; measured in Hertz
^{[e]} - Gaussian units [r]: A centimeter-gram-second system of units often used in electrodynamics and special relativity.
^{[e]} - Gravitational lens [r]: A lens formed when light from a very distant, bright source (such as a quasar) is 'bent' around a massive object (such as a cluster of galaxies) between the source object and the observer.
^{[e]} - Hendrik Antoon Lorentz [r]: Dutch theoretical physicist (1853 - 1928)
^{[e]} - James Clerk Maxwell [r]:
*Add brief definition or description* - Joule [r]:
*Add brief definition or description* - Lambert W function [r]:
*Add brief definition or description* - Laser rangefinder [r]:
*Add brief definition or description* - Light day [r]:
*Add brief definition or description* - Light hour [r]:
*Add brief definition or description* - Light minute [r]:
*Add brief definition or description* - Light second [r]:
*Add brief definition or description* - Lightning [r]:
*Add brief definition or description* - Lorentz force [r]:
*Add brief definition or description* - Magnetic constant [r]:
*Add brief definition or description* - Mass [r]:
*Add brief definition or description* - Maxwell equations [r]:
*Add brief definition or description* - Metre (unit) [r]: Unit of length; one of the seven SI base units.
^{[e]} - Momentum [r]:
*Add brief definition or description* - Number [r]:
*Add brief definition or description* - Oersted (unit) [r]:
*Add brief definition or description* - Photon [r]:
*Add brief definition or description* - Polarizability [r]:
*Add brief definition or description* - R-hadron [r]:
*Add brief definition or description* - Radiation [r]:
*Add brief definition or description* - Second (physics) [r]: Unit of time; one of the seven SI base units.
^{[e]} - Special relativity [r]:
*Add brief definition or description* - Statcoulomb [r]:
*Add brief definition or description* - Statvolt [r]:
*Add brief definition or description* - Wavelength [r]:
*Add brief definition or description*