- published: 06 Apr 2015
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In radiometry, radiance is the radiant flux emitted, reflected, transmitted or received by a surface, per unit solid angle per unit projected area, and spectral radiance is the radiance of a surface per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength. These are directional quantities. The SI unit of radiance is the watt per steradian per square metre (W·sr−1·m−2), while that of spectral radiance in frequency is the watt per steradian per square metre per hertz (W·sr−1·m−2·Hz−1) and that of spectral radiance in wavelength is the watt per steradian per square metre, per metre (W·sr−1·m−3)—commonly the watt per steradian per square metre per nanometre (W·sr−1·m−2·nm−1). The microflick is also used to measure spectral radiance in some fields. Radiance is used to characterize diffuse emission and reflection of electromagnetic radiation, or to quantify emission of neutrinos and other particles. Historically, radiance is called "intensity" and spectral radiance is called "specific intensity". Many fields still use this nomenclature. It is especially dominant in heat transfer, astrophysics and astronomy. "Intensity" has many other meanings in physics, with the most common being power per unit area.
The Radiance - Linkin Park (A Thousands Suns)
It Dies Today - The Radiance
The Requiem/The Radiance
Linkin Park - The Radiance/Breaking The Habit (Live In London, iTunes Festival 2011) [Full HD 1080p]
Linkin Park "Numb - The Radiance" [Live In Madrid]
Linkin Park - The Requiem & The Radiance [Lyrics]
Linkin Park - The Radiance / Breaking The Habit (Live in Madrid, Spain - 07.11.2010)
Linkin Park - The Radiance
You Are The Radiance (Live) // Kelanie Gloeckler // You Are The Radiance
Linkin Park - The Requiem/The Radiance/Burning In The Skies (with lyrics in the description)
This room is stark and this bed is unfamiliar
My only company tonight is this tattered photograph
Which simply serves as a reminder of everything that I have lost
The radiance of the stars in the sky seems meaningless
Without your pictures in my mind to reflect their images it's meaning less
Until you open up your eyes and turn away
I long for sleep so that I may visit you in my dreams tonight
It seems to be the closest that I come to catch their glow in your eyes
The radiance of the stars in the sky seems meaningless
Without your pictures in my mind to reflect their images it's meaning less
Until you open up your eyes and turn away
I wish I could just stop missing you
But you're all I have that gives all the meaning to the beauty in the sky
The radiance it's meaningless
The radiance of the stars in the sky seems meaningless
Without your pictures in my mind to reflect their images it's meaning less
Until you open up your eyes and turn away
The radiance it's meaningless