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:<math> c \,</math> is the [[speed of light]]. In a spaceship moving at 99% of the speed of light, a year passes. How much time will pass on earth? ...

*[[Light]] intensity (so-called [[Gaussian beam]]s, as in [[laser]] light) ...

...iplication|multiplied]] by the [[speed of light]] and then by the speed of light again. ...

...had been discovered in older physics. For example, older physics thought light moved in [[luminiferous aether]]. Various tiny effects were expected if thi ...pecial relativity theory. This is based on the constancy of the [[speed of light]] in all inertial frames of reference and the principle of relativity. ...

...arge every second. So in ten seconds, ten coulombs have passed through the light bulb. ...

...s the [[gravitational constant]], [[π]] is [[pi]], [[c]] is the [[speed of light]], and T_μv is called the ''stress-energy tensor''. ...

...et how much pure energy a given piece of something has. Since the speed of light is such a big number, this means that even a small amount of matter can hav ...

...(physics)|force]]. However, when an object is moving near the [[speed]] of light, a force is often written as the derivative of [[momentum]]. In this case, ...

...ses the bonds to move in that specific vibrational motion. By checking for light that gets absorbed, scientists can tell if a certain kind of molecular bond ...y one atom and don't have any bonds. This means that they won't absorb any light in the same way a molecule with more than one atom can. ...

|align="left"|[[speed of light]] ...l Society (1 January 1671 [Julian calendar]). S represents sunlight. The light between the planes BC and DE are in colour. These colours are recombined to ...

...a [[Lens (optics)|lens]] or other optical device to [[:wikt:focus|focus]] light. It is measured in [[dioptre]]s (inverse [[metre]]s), and is equal to one o ...

Based on the fact that light has a wave-particle duality, De Broglie showed that matter might exhibit wa ...

...urce at a constant angle to their flight path. Usually the sun is the only light source and flying that way will result in a practically straight line. ...

...2361}}</ref> However, lower mass star formation is occurring about 400–450 light years distant in the [[Rho Ophiuchi cloud complex|ρ Ophiuchi cloud complex] ...bibcode=2002A&A...383..502K}}</ref> The Bok globules are typically up to a light year across and contain a few [[solar mass]]es.<ref>{{cite book| first=Lee ...

...er second, which are [[watts]]. A watt is one unit of power, and just as a light bulb is measured in watts, so is the Sun, which has a total power output of ...

...lent CGS units (EMU/ESU) is equal exactly to the [[speed of light|speed of light in free space]], expressed in [[Centimetre|cm]]/[[Second|s]]. ...ee below), but in [[Gaussian units]] the magnetic moment is I×A/[[speed of light|c]]. ...

but if the force is strong and the object is light, then it will move a lot faster very quickly. ...

[[Category:Light]] ...

...make up atoms]] work. QM also tells how [[electromagnetic waves]] (like [[light]]) work. It is also called "quantum physics" or "quantum theory". [[File:Wavelength.png|thumb|250px|The wavelength of a wave of light]] ...

...ef> Examples of forms of energy in classical mechanics include [[heat]], [[light]], [[Kinetic energy|kinetic]] (movement) or [[Potential energy|potential]] ...