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Answer for the clue "Emitting or reflecting light ", 10 letters:
luminosity

Alternative clues for the word luminosity

Word definitions for luminosity in dictionaries

Wikipedia Word definitions in Wikipedia
In astronomy , luminosity is the total amount of energy emitted by a star , galaxy , or other astronomical object per unit time. It is related to the brightness, which is the luminosity of an object in a given spectral region. In SI units luminosity is ...

WordNet Word definitions in WordNet
n. the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun" [syn: brightness , brightness level , luminance , luminousness , light ]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Luminosity \Lu`mi*nos"i*ty\, n. The quality or state of being luminous; luminousness.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1630s, "quality of being luminous," from French luminosité or else a native formation from luminous + -ity . In astronomy, "intrinsic brightness of a heavenly body" (as distinguished from apparent magnitude , which diminishes with distance), attested from ...

Wiktionary Word definitions in Wiktionary
n. 1 (context uncountable English) the state of being luminous, or a luminous object; brilliance or radiance 2 (context physics English) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor 3 (context astronomy English) ...

Usage examples of luminosity.

Still on the same day, at the Argentine base at Orkney Island, two meteorological observers sighted an aerial object flying at high speed on a parabolic trajectory, course E-W, white luminosity, causing disturbance in the magnetic field registered on geomagnetic instruments with patterns notably out of the normal.

The noon sun struck down through the slot in the dome, hit the surface of the well water, and dazzled us with luminosity.

Matching of Hues -- Purity and Luminosity of Colours -- Matching Bright Hues -- Aid of Tinted Films -- Matching Difficulties Arising from Contrast -- Examination of Colours by Reflected and Transmitted Lights -- Effect of Lustre and Transparency of Fibres in Colour Matching -- Matching of Colours on Velvet Pile -- Optical Properties of Dye-stuffs, Dichroism, Fluorescence -- Use of Tinted Mediums -- Orange Film -- Defects of the Eye -- Yellowing of the Lens -- Colour Blindness, etc.

The heliometer parallax is doubtless less reliable than the photographic ones, and Doctor Adams states that the spectral type and luminosity of Betelgeuse make his value less certain than in the case of most other stars.

Every shining speck in the firmament is, no doubt, a luminous Sun, resembling our own, at least in its general features, and having in attendance upon it a greater or less number of planets, greater or less, whose still lingering luminosity is not sufficient to render them visible to us at so vast a distance, but which, nevertheless, revolve, moon-attended, about their starry centres, in obedience to the principles just detailed--in obedience to the three omniprevalent laws of revolution, the three immortal laws guessed by the imaginative Kepler, and but subsequently demonstrated and accounted for by the patient and mathematical Newton.

Like all the full moons that summer, they were oversized, rusted with a strange luminosity.

But how had the luminosities managed to corrupt and inflame the normally slumbersome Asian Combine?

The purity of her soft milky skin had a luminosity to it which swiftened Mr.

A dim though distinct luminosity seemed to inhere in all the vegetation, grass, leaves, and blossoms alike, while at one moment a detached piece of the phosphorescence appeared to stir furtively in the yard near the barn.

The leading luminosity of a prowling string of ten stopped in mid-air as if barred by an unseeable obstruction.

Several Trabis, the ubiquitous state-produced automobile, were parked against the curb on both sides of the street, still and driverless, but of the elusive suspects there was no trace at all, only an odd blue mist that seemed to glow with its own faint luminosity.

Nobody is denying that a Buddhist will interpret the luminosity as the Sambhogakaya, the Christian will interpret it perhaps as an angel or as Christ himself, a Jungian will interpret it as an archetypal emergence, and so on.

Just as Mrs Rackham reaches the monument, a peculiar thing happens: the whole of North Kensington undergoes a remarkable meteorological phenomenon--the sun is covered over by sheets of dark-grey cloud, but continues to shine with such brilliance that the clouds themselves assume an intense luminosity.

She was out and clear now, out and clear, and Grimes cut both inertial and reaction drives, used his gyroscopes to swing the sharp prow of the ship on to the target star, the Doncaster sun, brought that far distant speck of luminosity into the exact centre of his spiderweb sights.

Further, I say that had we never been cursed with these luminosities, we should not also be cursed today with most of our complications in childbirth.