This type of theoretical model, with frequency-independent emissivity lower than that of a perfect black body, is often known as a " grey body ".
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A few species vary in this, the ivory gull is entirely white, and some like the lava gull and Heermann's gull have partly or entirely grey bodies.
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The CS1 1318 model saw the new usage of yellow control knobs against a charcoal grey body set to provide a colour contrast to help those people who had some residual sight.
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A body that does not absorb all incident radiation ( sometimes known as a grey body ) emits less total energy than a black body and is characterized by an emissivity, \ varepsilon:
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In 2002, Ducati also produced the limited edition 748S Senna, which used the same components as the 748S but had flat grey body work, grey frame, and red Marchesini 5 spoke wheels.
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In flight, from above it shows rufous-chestnut flight feathers and the rufous uppertail, and from below it has a grey body, white underwing coverts, and greyish flight feathers and undertail.
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Alt = Typical depiction of Batgirl from " Batman : The Animated Series " : grey body-suit; blue scalloped gloves, cowl, and cape; yellow belt and bat-emblem.
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It is described in " Fantastic Beasts and Where to Find Them " as a shy, nocturnal creature with a smooth, pale grey body, bulging eyes and four spindly legs with large flat feet.
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The SI unit for absolute temperature " T " is the kelvin . " \ varepsilon " is the emissivity of the grey body; if it is a perfect blackbody, \ varepsilon = 1.
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It was considerably larger than the ( well-fed ) common gulls which were also in attendance, but had speckly-grey plumage rather than the uniform dark-grey body and white head / throat of common gulls.
