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Emission coefficient is a coefficient in the power output per unit time of an electromagnetic source, a calculated value in physics. The emission coefficient of a gas varies with the wavelength of the light. It has unit m⋅s −3 ⋅sr −1. [18]
EPANET provides an integrated environment for editing network input data, running hydraulic and water quality simulations, and viewing the results in a variety of formats. EPANET provides a fully equipped and extended period of hydraulic analysis that can handle systems of any size.
Schottky-emitter electron source of an Electron microscope. Electron emission that takes place in the field-and-temperature-regime where this modified equation applies is often called Schottky emission. This equation is relatively accurate for electric field strengths lower than about 10 8 V m −1.
The shape of the zero-phonon line is Lorentzian with a width determined by the excited state lifetime T 10 according to the Heisenberg uncertainty principle.Without the influence of the lattice, the natural line width (full width at half maximum) of the chromophore is γ 0 = 1/T 10.
In atomic, molecular, and optical physics, the Einstein coefficients are quantities describing the probability of absorption or emission of a photon by an atom or molecule. [1] The Einstein A coefficients are related to the rate of spontaneous emission of light, and the Einstein B coefficients are related to the absorption and stimulated ...
Spectral hemispherical attenuation coefficient: μ ν μ λ: m −1: Spectral radiant flux absorbed and scattered by a volume per unit length, divided by that received by that volume. Directional attenuation coefficient: μ Ω: m −1: Radiance absorbed and scattered by a volume per unit length, divided by that received by that volume.
By the principle of detailed balance, it is also a poor emitter of green light. In other words, if a material, illuminated by black-body radiation of temperature T {\displaystyle T} , is dark at a certain frequency ν {\displaystyle \nu } , then its thermal radiation will also be dark at the same frequency ν {\displaystyle \nu } and the same ...
Cold field electron emission (CFE) is the name given to a particular statistical emission regime, in which the electrons in the emitter are initially in internal thermodynamic equilibrium, and in which most emitted electrons escape by Fowler–Nordheim tunneling from electron states close to the emitter Fermi level.