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...nd all object sizes. If the object is much smaller than the wavelength of light, [[Rayleigh scattering]] theory is also quite good. When the object is big, the light can hit many places on the object. A quite good formula for the scattering ...

The most common examples include the reflection of [[light]], [[sound]] and [[Mechanical wave|water waves]]. ...e through point O that is at 90˚ to the mirror. The [[angle]]s made by the light ray (shown in the diagram as <math>\theta _i</math> and <math>\theta _r</ma ...

=== Light === ...then a photon with energy ''y'' is emitted by the atom and either becomes light or some other form of [[radiation]]. ...

...iewing at a certain angle, the straw appears to bend, due to refraction of light as it moves into the air]] ...'s [[speed]]. Examples of waves include [[sound|sound waves]] and [[light|light waves]]. Refraction is seen most often when a wave passes from one [[Media| ...

[[Particles]] which go near the [[speed of light]] are called '''ultrarelativistic'''. Einstein then went on to show that a particle can never achieve the speed of light, because you get a [[divide by zero error]] from the equation for [[kinetic ...

...to [[watt]]s. A watt is one unit of [[Power (physics)|power]]. Just as a [[light bulb]] is measured in watts, the [[Sun]] can also be measured in watts. The ...distance. The apparent magnitude is the less, for objects more than 32.6 light years away. ...

.... An image is created of the spectrum of light with black breaks where the light has been absorbed. These breaks are called absorption lines, and every elem ...n|electrons]] in the [[atom|atoms]] of the sample - an electron can absorb light to gain energy. From experiments, electrons only ever absorb certain amount ...

...ave]] or water wave. Until the 20th century, most physicists thought that light was either one or the other, and that the scientists on the other side of t ...holes, it created an ''[[interference]] pattern'' that seemed to show that light was actually a wave. ...

...[[particle]]s which [[wikt:transmit|transmit]] [[light]]. In other words, light is carried over [[Space (physics)|space]] by photons. Photon is an elementa ...ntum]]. Before the photon got its name, Einstein revived the proposal that light is separate pieces of energy (particles). These particles came to be known ...

...tion''' is a process where a [[molecule]] absorbs ultraviolet or visible [[light]] that excites [[electrons]] (makes them high [[energy]]). This energy caus ...molecules will absorb different wavelengths of light. The wavelengths of light for UV-visible absorption are from about 200 nanometers to 800 nanometers. ...

...[[mass]] changes in for an object moving at speeds close to the [[speed of light]] (relativistic speeds). where v is the speed of the object and c is the speed of light. The quantity (v/c) is often labeled <math>\beta</math> (beta) and so the a ...

...ht waves is '''<math>f = c/\lambda</math>''' where the c is the [[speed of light]]. All [[electromagnetic waves]] travel at the speed of light in a [[vacuum]] '''but''' they travel at slower speeds when they travel thr ...

...lb, then the light bulb will light up. If the resistance is high, then the light will be darker. The unit of resistance is “Ω”,  which is called omega, and ...value of the voltage is 20V. He also knows the resistance, which is in the light bulb, is 10 Ω. He needs to find the other unknown variable, which is curren ...

...d a [[magnetic field]] and carry [[energy]]. They travel at the [[speed of light]].<ref>This is always defined as the speed of propagation in a [[vacuum]] S ...with normal eyesight in the colors of the [[rainbow]]. Invisible light is light one can't see with normal eyesight and includes more energetic and higher [ ...

...re many physical constants in science. Some famous ones are the [[speed of light]], [[Planck's constant]], the [[gravitational constant]], and [[Avogadro's |[[speed of light]] ...

In units where the [[speed of light]], <math>c</math>, is one, then the metric in [[matrix]] form is ...

[[File:World line.svg|thumb|Example of a light cone.]] ...ts <math>ct</math>. The reason for measuring time in units of the speed of light times the time coordinate is so that the units for time are the same as the ...

...rrow energy bands in the [[spectrum]]. The light beam is also [[Collimated light|collimated]] on the orbit plane of the electrons. This radiation is guided mass and ''c'' is the speed of light, characterizes the nature of the electron motion. For ...

:<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) ...