1. Wikipedia
    https://en.wikipedia.org/wiki/Speed_of_Light

    Speed of light - Wikipedia

    • The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour). According to the special theory of relativity, c is the upper limit for the speed at which conventional matter or energy (a… See more

    Numerical value, notation, and units

    The speed of light in vacuum is usually denoted by a lowercase c, for "constant" or the Latin celeritas (meaning … See more

    Fundamental role in physics

    The speed at which light waves propagate in vacuum is independent both of the motion of the wave source and of the inertial frame of reference of the observer. This invariance of the speed of light was postulated … See more

    Faster-than-light observations and experiments

    There are situations in which it may seem that matter, energy, or information-carrying signal travels at speeds greater than c, but they do not. For example, as is discussed in the propagation of light in a medium section bel… See more

    Propagation of light

    In classical physics, light is described as a type of electromagnetic wave. The classical behaviour of the electromagnetic field is described by Maxwell's equations, which predict that the speed c with which electromag… See more

    Practical effects of finiteness

    The speed of light is of relevance to telecommunications: the one-way and round-trip delay time are greater than zero. This applies from small to astronomical scales. On the other hand, some techniques … See more

    Measurement

    There are different ways to determine the value of c. One way is to measure the actual speed at which light waves propagate, which can be done in various astronomical and Earth-based setups. It is also possib… See more

    History

    Until the early modern period, it was not known whether light travelled instantaneously or at a very fast finite speed. The first extant recorded examination of this subject was in ancient Greece. … See more

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    Table of Contents
    Numerical value, notation, and units
    Fundamental role in physics
    Faster-than-light observations and experiments
    Propagation of light
    Practical effects of finiteness
    Measurement
    History
     
  1. Speed of light · c
    299,792,458
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    The speed of light in a vacuum, denoted by the symbol c, describes the speed at which photons travel in a vacuum. According to the Theory of Special Relativity proposed by Albert Einstein, the speed of light is the maximum …
    The speed of light in a vacuum, denoted by the symbol c, describes the speed at which photons travel in a vacuum. According to the Theory of Special Relativity proposed by Albert Einstein, the speed of light is the maximum speed at which all matter in the universe can travel.
    Wikipedia

    Found in

    Mass-energy equivalence
    The mass-energy equivalence states that anything having mass has an equivalent amount of energy and vice versa. The formula states that the equivalent energy can be calculated as the mass multiplied by the speed of light. The formula implies that an everyday object at rest with a modest amount of mass has a very large amount of energy intrinsically.
    Wikipedia
    E = mc2
    E=energy · m=mass · c=speed of light
    Maxwell's equations
    In classical physics, light is a type of electromagnetic wave. The classical behavior of the electromagnetic field is described in Maxwell's equations, which show that the speed with whigh light can propogate is related to the electric constant and magnetic constant.
    Wikipedia
    c=1ε0μ0c=\frac{1}{\sqrt{\varepsilon_0 \mu_0}}
    c=speed of light · μ0=magnetic constant · ε0=electric constant

    Explore more science constants

     
  2. Space.com
    https://www.space.com/speed-of-light-properties-explained.html

    Why is the speed of light the way it is? | Space

  3. Interesting reads - Speed Of Light

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  4. Science Notes and Projects
    https://sciencenotes.org/what-is-the-speed-of-light

    What Is the Speed of Light? - Science Notes and Projects

  6. Wikipedia
    https://simple.wikipedia.org/wiki/Speed_of_light

    Speed of light - Simple English Wikipedia, the free encyclopedia

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