4/7/2024 0 Comments Transmit symbolIrradiance of a surface per unit frequency or wavelength. This is sometimes also confusingly called "intensity". Radiant flux received by a surface per unit area. Watt per steradian per square metre, per metre This is sometimes also confusingly called "spectral intensity". The latter is commonly measured in W⋅sr −1⋅m −2⋅nm −1. Radiance of a surface per unit frequency or wavelength. Watt per steradian per square metre per hertz Radiant flux emitted, reflected, transmitted or received by a surface, per unit solid angle per unit projected area. The latter is commonly measured in W⋅sr −1⋅nm −1. Radiant intensity per unit frequency or wavelength. Radiant flux emitted, reflected, transmitted or received, per unit solid angle. The latter is commonly measured in W⋅nm −1. Radiant flux per unit frequency or wavelength. This is sometimes also called "radiant power". Radiant energy emitted, reflected, transmitted or received, per unit time. Hemispherical transmittance of a surface, denoted T, is defined as T = Φ e t Φ e i, Ĭases of non-uniform attenuation occur in atmospheric science applications and radiation shielding theory for instance. Mathematical definitions Hemispherical transmittance 1.2 Spectral hemispherical transmittance.
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