马赛克
发表于 2025-3-23 10:39:11
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赤字
发表于 2025-3-23 15:16:46
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不容置疑
发表于 2025-3-23 19:47:07
Nonblackbody Radiationking it, “black” cloth slightly over 1%, and “black” velvet 0.4%. A fundamental property of a perfectly black body is that its shape, material, and surface characteristics have no bearing whatever on its radiating and absorbing characteristics.
apropos
发表于 2025-3-24 00:50:03
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宠爱
发表于 2025-3-24 06:17:18
Radiative Heat Exchange in a Nonabsorbing Mediumadiation. In this event the radiation will be nonuniform and anisotropic. It will represent the sum of the thermal radiation emitted by all the bodies. Unlike the case for equilibrium radiation, the radiant emittance will now depend on the properties and temperature of all the bodies and the medium occupying the space between the bodies .
overwrought
发表于 2025-3-24 09:42:17
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青少年
发表于 2025-3-24 11:24:04
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小隔间
发表于 2025-3-24 17:39:26
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A简洁的
发表于 2025-3-24 22:23:47
Application of the Planck FormulaIn Chapter II it was shown that the various spectral scales are all essentially equivalent. It therefore suffices to examine the Planck formula in terms of the absolute temperature and a wavelength scale, for instance.
CRANK
发表于 2025-3-25 00:31:02
Determination of EmissivitySince the emissivity of most materials is determined experimentally, we must discriminate clearly between the characteristics of the various methods for measuring the emissivity, and examine the procedural aspects of each. A description of equipment for conducting the experiments does not, however, fall within the purview of this book.