| 31. | Such superwindows also have soft-coat low-emissivity coatings on all the glass surfaces.
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| 32. | The emissivity depends on the wavelength, \ varepsilon = \ varepsilon ( \ lambda ).
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| 33. | In response to thermal radiation, surface temperature depends on the thermal emissivity of the material.
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| 34. | The term emissivity is generally used to describe a simple, homogeneous surface such as silver.
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| 35. | A major consideration is the low emissivity of yttria, which limits background radiation upon heating.
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| 36. | The net emissivity may be low due to surface or atmospheric properties, including greenhouse effect.
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| 37. | This " naturally " low thermal emissivity is found in some formulations of borosilicate or Pyrex.
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| 38. | High emissivity roofs have much higher heat loss in cold climates for the same insulation values.
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| 39. | Its emissivity varies considerably with temperature.
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| 40. | The ability of a material to radiate energy is measured by the emissivity of the material.
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