peratures remain constant; thus the enclosuremust in the same time lose 70 units which must enter theblack body. These 70 units are radiated by the enclosure tothe black body. Thus a surface which absorbs 70 per cent,of the energy absorbed by a black surface at the sametemperature, emits 70 per… … 210 HEAT. EXAMPLES. RADIATION. 1. How would you shew that radiant heat is refracted similarly tolight? Explain the action of a glass fire-screen. 2. A red-hot ball of iron looks equally bright in all its parts and atwhatever distance from the eye it be placed. Explain these facts. 3. A vessel…
Heat · Light
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