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Number of Results: 12 Search : photon

baryon-photon ratio vâbar-e bâriyon-foton Fr.: rapport baryon-photon The → |

Lyman-Werner photon foton-e Lyman-Werner Fr.: photon de Lyman-Werner An → → |

photon foton (#) Fr.: photon The → From |

photon escape time zamân-e goriz-e foton Fr.: temps d'échappement des photons The time required for a photon created in the Sun's core to attain the
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photon gas gâz-e fotoni Fr.: gaz de photons → |

photon hardening saxteš-e foton Fr.: durcissement des photons An effect occurring in the outer zones of → |

photon noise nufe-ye foton Fr.: bruit de photons An intrinsic noise caused by the quantum nature of light.
Same as → |

photon sphere sepehr-e foton Fr.: sphère de photons A surface where if a photon is emitted from one of its points the photon follows
a closed orbit and returns periodically to its departure point.
Such a surface exists only near sufficiently → G is the → gravitational constant, M is the
mass, c is the → speed of light, and R
is the → _{S}Schwarzschild radius.
For a rotating, → Kerr black hole, the situation is much more
complex due to the → Lense-Thirring effect.
In that case circular paths exist for radii whose values depend on
the rotation direction. More specifically, in the equatorial plane there are two
possible circular light paths: a smaller one in the direction of the rotation,
and a larger one in the opposite direction. |

photon tiring limit hadd-e xastegi-ye foton Fr.: limite par fatigue du photon The maximum → v_{∞}^{2}/2 + GM/R) =
Mdot (v_{∞}^{2}/2 + v_{esc}^{2}/2). For
L, the mass loss rate is
_{wind} = L_{*}Mdot = 2_{max}L_{*}/(v_{∞}^{2} +
v_{esc}^{2}).
Following Owoki & Gayly (1997), Mdot is the maximum
mass loss rate when the wind just escapes the gravitational potential, with
_{tir}v tending toward zero.
_{∞}Mdot is much larger than typical mass
loss rates from → _{tir}line-driven winds, where the driving lines become
saturated with increasing density limiting the wind mass loss rates to
about 10^{-4} Msun yr^{-1} in even the most luminous stars.→ |

photon-baryon plasma plâsmâ foton-bâriyon Fr.: plasma photon-baryon The plasma filling space before the → |

photonics fotonik Fr.: photonique The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. |

two-photon emission gosil-e do-fotoni Fr.: émission à deux photons The simultaneous emission of two photons whose sum of energies is equal to that of a
single electron transition. The energy of each individual photon of the pair is not fixed,
so that the spectrum of two-photon emission is continuous from the wavelength of that
transition to infinity. In practice, there is a peak in wavelength distribution of the
emitted photons. Two-photon emission is studied atomic physics with application in astrophysics,
as it contributes to the continuum radiation from
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