s, thoughat the same temperature, emit very different amounts of radia-tion, and these radiating powers can be compared by comparingthe respective deflections. 164-166] TRANSMISSION OF HEAT BY RADIATION. 197 These last two experiments have shewn us that lampblackradiates out more heat at a given… … Fig. 78. surface. The radiation emitted by any surface will be lessthan that emitted by a lampblack surface at the same tem-perature; the ratio of the two amounts may be spoken of asthe emissive power of the surface. Definition. TJie emissive power of a surface is the ratioof the amount of…
Heat · Light
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