12/3/2023 0 Comments Black radiant meaning![]() ![]() Radiant flux emitted by a surface per unit area. This is sometimes also confusingly called "spectral intensity". The latter is commonly measured in W⋅m −2⋅nm −1. Radiosity of a surface per unit frequency or wavelength. ![]() This is sometimes also confusingly called "intensity". Radiant flux leaving (emitted, reflected and transmitted by) a surface per unit area. Non-SI units of spectral flux density include jansky (1 Jy = 10 −26 W⋅m −2⋅Hz −1) and solar flux unit (1 sfu = 10 −22 W⋅m −2⋅Hz −1 = 10 4 Jy). Irradiance of a surface per unit frequency or wavelength. Radiant flux received by a surface per unit area. Watt per steradian per square metre, per metre 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", and called luminosity in Astronomy. Radiant energy emitted, reflected, transmitted or received, per unit time. M e, λ = ∂ M e ∂ λ, įor a real surface, the spectral exitance is equal to: Radiant exitance of a surface, denoted M e ("e" for "energetic", to avoid confusion with photometric quantities), is defined as Mathematical definitions Radiant exitance Radiant exitance is often called "intensity" in branches of physics other than radiometry, but in radiometry this usage leads to confusion with radiant intensity. The CGS unit erg per square centimeter per second ( erg m −3)-commonly the watt per square metre per nanometre ( W.Hz −1) and that of spectral exitance in wavelength is the watt per square metre per metre (W.The SI unit of radiant exitance is the watt per square metre ( W/m 2), while that of spectral exitance in frequency is the watt per square metre per hertz (W This is the emitted component of radiosity. In radiometry, radiant exitance or radiant emittance is the radiant flux emitted by a surface per unit area, whereas spectral exitance or spectral emittance is the radiant exitance of a surface per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength. ![]()
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