enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Maxwell's equations - Wikipedia

   en.wikipedia.org/wiki/Maxwell's_equations

   Maxwell's equations, or Maxwell–Heaviside equations, are a set of coupled partial differential equations that, together with the Lorentz force law, form the foundation of classical electromagnetism, classical optics, electric and magnetic circuits. The equations provide a mathematical model for electric, optical, and radio technologies, such ...

3. Speed of light - Wikipedia

   en.wikipedia.org/wiki/Speed_of_Light

   v. t. e. 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).

4. Einstein field equations - Wikipedia

   en.wikipedia.org/wiki/Einstein_field_equations

   t. e. In the general theory of relativity, the Einstein field equations (EFE; also known as Einstein's equations) relate the geometry of spacetime to the distribution of matter within it. [ 1 ] The equations were published by Albert Einstein in 1915 in the form of a tensor equation [ 2 ] which related the local spacetime curvature (expressed by ...

5. Lorentz transformation - Wikipedia

   en.wikipedia.org/wiki/Lorentz_transformation

   For example, they reflect the fact that observers moving at different velocities may measure different distances, elapsed times, and even different orderings of events, but always such that the speed of light is the same in all inertial reference frames. The invariance of light speed is one of the postulates of special relativity.

6. Photon - Wikipedia

   en.wikipedia.org/wiki/Photon

   The "time" axis gives the angular frequency (rad⋅s −1) and the "space" axis represents the angular wavenumber (rad⋅m −1). Green and indigo represent left and right polarization. In empty space, the photon moves at c (the speed of light) and its energy and momentum are related by E = pc, where p is the magnitude of the momentum vector p.

7. Fine-structure constant - Wikipedia

   en.wikipedia.org/wiki/Fine-structure_constant

   c is the speed of light (299 792 458 m⋅s −1 ‍ [8]); ε 0 is the electric constant ( 8.854 187 8188 (14) × 10 −12 F⋅m −1 ‍ [ 9 ] ). Since the 2019 revision of the SI , the only quantity in this list that does not have an exact value in SI units is the electric constant (vacuum permittivity).

8. Derivations of the Lorentz transformations - Wikipedia

   en.wikipedia.org/wiki/Derivations_of_the_Lorentz...

   The usual treatment (e.g., Albert Einstein's original work) is based on the invariance of the speed of light. However, this is not necessarily the starting point: indeed (as is described, for example, in the second volume of the Course of Theoretical Physics by Landau and Lifshitz), what is really at stake is the locality of interactions: one supposes that the influence that one particle, say ...

9. Energy–momentum relation - Wikipedia

   en.wikipedia.org/wiki/Energy–momentum_relation

   This equation holds for a body or system, such as one or more particles, with total energy E, invariant mass m 0, and momentum of magnitude p; the constant c is the speed of light. It assumes the special relativity case of flat spacetime [ 1 ] [ 2 ] [ 3 ] and that the particles are free.