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| caption = Photons emitted in a [[Coherence (physics)|coherent]] beam from a [[laser]] ...teraction|interaction]]s at long distances. Like all elementary particles, photons are governed by [[quantum mechanics]] and will exhibit [[wave-particle dual ...

...still high enough for electrons and nuclei to remain unbound, however, and photons were constantly "reflected" from these free electrons through a process cal ...he blackbody spectrum but caused its temperature to fall, meaning that the photons now fall into the [[microwave]] region of the [[electromagnetic spectrum]]. ...

...d.<ref>See "[http://www.physics.uq.edu.au/people/ross/phys2100/doppler.htm Photons, Relativity, Doppler shift]" at the University of Queensland</ref> ...not due to classical [[momentum]] and [[energy]] transfer, but instead the photons increase in wavelength and redshift as the space through which they are tra ...

...also be modified through bombardment by high energy subatomic particles or photons. If this modifies the number of protons in a nucleus, the atom changes to a ...roduction of high-speed electrons which are not beta rays, and high-energy photons which are not gamma rays. ...

...e fused in the core, they emit energy in the form of [[gamma ray]]s. These photons interact with the surrounding plasma, adding to the thermal energy at the c .... This is the layer at which the plasma of the star becomes transparent to photons of light. From here, the energy generated at the core becomes free to propa ...

| title=Apparent weight of photons ...