Radiating and Absorbing Powers
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-257
2025-12-29
922
The radiating power of a heated body depends upon its temperature and the character of its surface. A body with a smooth, brightly polished surface has a much lower radiating power than one of the same material but with a dull surface. Bodies that absorb heat readily are good radiators and poor reflectors. The power of absorption depends somewhat upon color. This can be shown by placing upon snow two pieces of cloth, one black and the other white. It will be found that when the sun shines upon them, the black piece will absorb heat and melt its way into the snow, while the white will not.
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