# luminous intensity

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## lu·mi·nous in·ten·si·ty (I),

the luminous flux per unit solid angle in a given direction.

## lu·mi·nous in·ten·si·ty

(I) (lū'mi-nŭs in-ten'si-tē)
The luminous flux per unit solid angle in a given direction.

## intensity, luminous

Quotient of the luminous flux leaving the source, propagated in an element of solid angle containing the given direction, divided by the element of solid angle. Symbol: I. Unit: candela (CIE).
References in periodicals archive ?
[I.sub.[lambda]]([OMEGA]) = directional spectral radiant intensity (W/[m.sup.2] x sr x [micro]m)
[I.sub.b,[lambda]] = spectral radiant intensity for a black body (W/[m.sup.2] x sr x [micro]m)
[I.sub.bndx,[lambda]] = total spectral radiant intensity at boundary in the x direction (W/[m.sup.2] x sr x [micro]m)
[I.sub.bndy,[lambda]] = total spectral radiant intensity at boundary in the y direction (W/[m.sup.2] x sr x [micro]m)
[I.sub.bndz,[lambda]] = total spectral radiant intensity at boundary in the z direction (W/[m.sup.2] x sr x [micro]m)
[I.sub.[lambda]] = total spectral radiant intensity (W/[m.sup.2] x sr x [micro]m)
[I.sup.j] = Total Radiant Intensity in discrete direction (W/[m.sup.2] x sr x [micro]m)
[I.sub.p.sup.j] = total radiant intensity in discrete direction j for pth control volume (p varies from 1 to total number of control volumes) (W/[m.sup.2] x sr x [micro]m)
Theory indicates that if the magnetic field, radius of the orbit, and electron current are known, then the absolute radiant intensity of the beam can be calculated.