The pallor of his countenance had assumed, if possible, a more ghastly hue but the luminousness of his eye had utterly gone out.

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V (λ) is the spectral luminous efficiency

In addition, it's multi spectral.

Annex 6 Xenon relative spectral distribution

limit towards spectral value y 0.992 x

Ee (λ) W nm is the spectral distribution of the radiant flux

3D FITS data viewer for spectro imaging

More generally, similar techniques may be used to estimate a time varying spectral density.

Kernels are also used in time series, in the use of the periodogram to estimate the spectral density.

The light source shall be an incandescent lamp with a colour temperature in the range 2800 to 3250 K or a green light emitting diode (LED) with a spectral peak between 550 and 570 nm.

The light source shall be an incandescent lamp with a colour temperature in the range of 2800 to 3250 K or a green light emitting diode (LED) with a spectral peak between 550 and 570 nm.

He was studying the relationship between the spectral classification of stars and their actual brightness as corrected for distance their absolute magnitude.

There have been three main ways to formulate spectral theory, all of which retain their usefulness.

And it turns out once again that spectral sensitivity is very important here.

There is no single conversion factor between lx and W m2 there is a different conversion factor for every wavelength, and it is not possible to make a conversion unless one knows the spectral composition of the light.

The background radiation is simply too static to be able to be seen under the normal spectral analysis.

A spectral line or a spectra is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorpion of light in a narrow frequency range, compared with the nearby frequencies.

Since for most natural light sources, the coherence time is much shorter than the time resolution of any detector, the detector itself does the time averaging.

The spectral centroid of a signal is the midpoint of its spectral density function, i.e.

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The now ghastly pallor of the skin, and the now miraculous lustre of the eye, above all things startled and even awed me.

The product of the density of states and the probability distribution function is the number of occupied states per unit volume at a given energy for a system in thermal equilibrium.

The spectral evening light seemed to revive the shadows of the castle once more

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The giant star Antares, which is very red (spectral class M1), is surrounded by a large, red reflection nebula.

The role of spectral theory arises in establishing the nature and existence of the basis and the reciprocal basis.

Same as background

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mp3PRO is an unmaintained proprietary audio compression codec that combines the MP3 audio format with the spectral band replication (SBR) compression method.

(b) An infrared mapping spectrometer with low spatial resolution and high spectral resolution to measure the surface mineralogy.

For instance, you see the spectral line of the gold is the only spectral line in the spectrum of the Sun.

The inverse of some colour is called the complementary colour, which when added to it produces white, undoing the effect of the first colour.

Same as foreground

Same as alt. background

Same as active

Equals background

Differing background

colour if not white ,

In mathematics, the Hilbert Pólya conjecture is a possible approach to the Riemann hypothesis, by means of spectral theory.

The calculation then shall be based on a luminous source with a relative spectral distribution as listed in Annex 6.