In optical engineering and telecommunications engineering, the flick is a unit of spectral radiance. One flick corresponds to a spectral radiance of 1 watt per steradian per square centimeter of surface per micrometer of span in wavelength (W·sr−1·cm−2·μm−1). This is equivalent to 1010 watts per steradian per cubic meter (W·sr−1·m−3). In practice, spectral radiance is typically measured in microflicks (10−6 flicks). One microflick is equivalent to 10 kilowatts per steradian per cubic meter (kW·sr−1·m−3).
- Palmer, James M. "The SI system and SI units for Radiometry and photometry".
- Rowlett, Russ. "How Many? A Dictionary of Units of Measurement". Retrieved 10 August 2012.
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