Flick (f)
Flick (f) :
A unit of spectral radiance used in optical and communications engineering. Radiance is the power radiated per unit solid angle per unit of emitting surface. Radiance varies with wavelength, and to measure this variation spectral radiance is defined is the radiance per unit of wavelength span. The flick is a short name for the spectral radiance of 1 watt per steradian per square centimeter of surface per micrometer of span in wavelength. This is mathematically equivalent to 1010 watts per steradian per cubic meter. In practice, spectral radiance is typically in microflicks
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