17-927

photon flux [Φp]

quotient of the number of photons, dNp, emitted, transmitted, or received in an element of time, dt, by that element of time

        

Unit: s-1

NOTE For a beam of radiation whose spectral distribution is    or  , the photon flux Φp is:

        

where

h is the Planck constant;

c0 is the speed of light in vacuum.

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