Astrophysics (Index)About

radiant flux

(measure of brightness)

Radiant flux (often symbolized φe) the rate of energy (power) emitted/radiated by something, e.g., joules per second, aka, watts. Spectral fluxe,ν or φe,λ) is the radiant power per frequency or wavelength. The above terms are common in sciences other than astrophysics, in which the term luminosity is used for an astronomical object's (e.g., a star's) radiant flux.


(EMR,measure)
Further reading:
https://en.wikipedia.org/wiki/Radiant_flux

Referenced by pages:
flux
luminosity distance (dL)
photon counting
radiometer
spectral index (α)

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