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Thermal Properties of Matter
Question
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  • higher than 0°C

  • higher than 0 K

  • higher than that of its surroundings

  • high enough for it to glow

Answer

B.

higher than 0 K

All objects with a temperature greater than absolute 0 emit electromagnetic radiation, which is commonly called the object's thermal emission. The temperature of the radiating body determines the intensity and characteristics of the radiation it emits.

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A radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface is