class 30 - Click to edit Master subtitle style 8/13/11...

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Unformatted text preview: Click to edit Master subtitle style 8/13/11 Radiation: Processes and Properties Chapter 12 Sections 12.1 through 12.2 8/13/11 Consider a solid in a vacuum that is initially at a temperature that is greater than that of its surroundings. What mode(s) of heat transfer can occur? I. Conduction II. Convection III. Radiation a) All three but radiation is dominant b) I and III but radiation is dominant c) II and III but radiation is dominant d) III only e) No heat transfer can occur in a vacuum 8/13/11 General Considerations Attention is focused on thermal radiation , whose origins are associated with emission from matter at an absolute temperature T > 0 Emission is due to oscillations and transitions of the many electrons that comprise matter, which are, in turn, sustained by the thermal energy of the matter. Which will increase the thermal energy of the matter? a) Emission b) Absorption c) Both of them will 8/13/11 General Considerations Attention is focused on thermal radiation , whose origins are associated with emission from matter at an absolute temperature...
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class 30 - Click to edit Master subtitle style 8/13/11...

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