luminous flux
luminous flux
luminous flux
lu′minous flux′
n.
| Noun | 1. | luminous flux - the rate of flow of light energy |
n.
luminous flux
Luminous flux
The time rate of flow of light. It is radiant flux in the form of electromagnetic waves which affects the eye or, more strictly, the time rate of flow of radiant energy evaluated according to its capacity to produce visual sensation. The visible spectrum is ordinarily considered to extend from 380 to 760 nanometers in wavelength; therefore, luminous flux is radiant flux in that region of the electromagnetic spectrum. The unit of measure of luminous flux is the lumen. See Photometry
Luminous flux
Luminous Flux
a photometric quantity. Luminous flux is radiant flux—that is, the power of the optical radiation —evaluated with respect to its capacity to produce visual sensation. More precisely, luminous flux is radiant flux evaluated according to its action on a selective optical detector whose spectral sensitivity is defined as a function of the spectral luminous efficiency V(λ), where λ is the wavelength of the light in a vacuum. The unit of luminous flux is the lumen. The relation between the luminous flux Фv and the radiant flux Фe is given by the equation
Here, Km is the maximum value of the spectral luminous efficacy; Km ≈ 680 lumens per watt at a wavelength of 555 nanometers.
luminous flux
[′lü·mə·nəs ′fləks]luminous flux
luminous flux
The energy field generated by light. See lumen.luminous flux
lu·mi·nous flux
flux, luminous
luminous flux
- noun
Words related to luminous flux
noun the rate of flow of light energy
Related Words
- radiant flux