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searching for Spectral radiance 25 found (69 total)

Reflectance (1,272 words) [view diff] exact match in snippet view article find links to article

spectral radiance in frequency reflected by that surface; Le,Ω,νi is the spectral radiance received by that surface; Le,Ω,λr is the spectral radiance

Transmittance (1,057 words) [view diff] exact match in snippet view article find links to article

the spectral radiance in frequency transmitted by that surface; Le,Ω,νi is the spectral radiance received by that surface; Le,Ω,λt is the spectral radiance

Absorptance (536 words) [view diff] exact match in snippet view article find links to article

spectral radiance in frequency absorbed by that surface; ⁠ L e , Ω , ν i {\displaystyle L\mathrm {_{e,\Omega ,\nu }^{i}} } ⁠ is the spectral radiance

Attenuation coefficient (2,210 words) [view diff] exact match in snippet view article find links to article

{d} z}},\end{aligned}}} where Le,Ω,ν is the spectral radiance in frequency; Le,Ω,λ is the spectral radiance in wavelength. When a narrow (collimated) beam

GRS 1124-683 (476 words) [view diff] no match in snippet view article find links to article

The gamma-ray and X-ray source GRS 1124-683, discovered by the Granat mission and Ginga, is a system containing a black hole candidate. The system also

Emissivity (4,090 words) [view diff] exact match in snippet view article find links to article

\end{aligned}}} where Le,Ω,ν is the spectral radiance in frequency of that surface; Le,Ω,ν° is the spectral radiance in frequency of a black body at the

Luminance (1,336 words) [view diff] exact match in snippet view article find links to article

falls within a given solid angle. The procedure for conversion from spectral radiance to luminance is standardized by the CIE and ISO. Brightness is the

Wien's displacement law (3,412 words) [view diff] exact match in snippet view article find links to article

the wavelength version of Wien's displacement law states that the spectral radiance of black-body radiation per unit wavelength, peaks at the wavelength

Phosphorus deficiency (1,206 words) [view diff] exact match in snippet view article find links to article

compounds and elements. Additional phosphorus detection methods such as spectral radiance and inductively coupled plasma spectrometry (ICP) are also implemented

Black-body radiation (8,774 words) [view diff] exact match in snippet view article find links to article

(that is, the net amount of radiation leaving its surface, called the spectral radiance) is determined solely by the equilibrium temperature and does not

Spectroradiometer (3,091 words) [view diff] exact match in snippet view article find links to article

spectrometer is then able to provide measurements of spectral irradiance, spectral radiance and/or spectral flux. This data is also then used with built in or

Colorimetry (1,052 words) [view diff] exact match in snippet view article find links to article

tristimulus values of a color. A spectroradiometer measures the absolute spectral radiance (intensity) or irradiance of a light source. A spectrophotometer measures

Planckian locus (2,259 words) [view diff] exact match in snippet view article find links to article

constant for spectral radiance) instead of c1 (the “regular” first radiation constant), in which case the formula would give the spectral radiance L(λ,T) of

Sentinel-4 (1,652 words) [view diff] exact match in snippet view article find links to article

than 0.05%. The in-flight absolute radiometric accuracy of the Earth spectral radiance and of the Sun irradiance is required to be better than 3% with a

Hyperspectral imaging (4,957 words) [view diff] exact match in snippet view article find links to article

time-averaged spectral radiance at 2078 cm−1 corresponding to a CO2 emission line. Bottom panel: Contour map of the spectral radiance at 2580 cm−1 corresponding

List of physical constants (1,713 words) [view diff] exact match in snippet view article find links to article

Retrieved 2024-05-18. "2022 CODATA Value: first radiation constant for spectral radiance". The NIST Reference on Constants, Units, and Uncertainty. NIST. May

Standard illuminant (4,815 words) [view diff] exact match in snippet view article find links to article

method can be applied to. For each of these standard illuminants, spectral radiance factor data are supplied for five pairs of nonfluorescent samples

Melting point (3,069 words) [view diff] exact match in snippet view article find links to article

materials, this may require extrapolation by several hundred degrees. The spectral radiance from an incandescent body is known to be a function of its temperature

Planck constant (6,180 words) [view diff] exact match in snippet view article find links to article

Planck constant. The expression formulated by Planck showed that the spectral radiance per unit frequency of a body for frequency ν at absolute temperature

Aperture (antenna) (3,345 words) [view diff] exact match in snippet view article

being bathed in black-body radiation of temperature T, receives a spectral radiance (power per unit area per unit frequency per unit solid angle) given

Lucy (spacecraft) (4,390 words) [view diff] exact match in snippet view article

instrument collects data from 6–75 μm and has a noise equivalent spectral radiance (NESR) of 2.310–8 W cm−2 sr−1 cm−1 between 300 cm−1 (7.4 μm) and 1350 cm−1

Heat transfer (8,475 words) [view diff] exact match in snippet view article find links to article

unit or thermal resistance) to temperature difference. Radiance, or spectral radiance, is a measure of the quantity of radiation that passes through or

Temperature (13,010 words) [view diff] exact match in snippet view article find links to article

accurate temperature measurement because the frequency of maximum spectral radiance of black-body radiation is directly proportional to the temperature

X-ray astronomy (8,115 words) [view diff] exact match in snippet view article find links to article

results in ever greater demands for finer angular resolution and spectral radiance. There are inherent difficulties in making X-ray/optical, X-ray/radio

Remote sensing (oceanography) (4,497 words) [view diff] exact match in snippet view article

}T}}-1}}\cdot \epsilon } With B ( ν , T ) {\displaystyle B(\nu ,T)} the spectral radiance, h {\displaystyle h} the Planck constant; c {\displaystyle c} the