Difference between revisions of "Temperature Constancy"
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: [[Object]]s will [[Absorb (Physics)|absorb]] [[radiation]] that [[Incident Ray|incidents]] its surface. The [[colour]] and [[reflectivity]] of the [[object]] determine the amount of [[radiation]] [[Absorb (Physics)|absorbed]]. | : [[Object]]s will [[Absorb (Physics)|absorb]] [[radiation]] that [[Incident Ray|incidents]] its surface. The [[colour]] and [[reflectivity]] of the [[object]] determine the amount of [[radiation]] [[Absorb (Physics)|absorbed]]. | ||
: When the rate of [[energy]] [[emission]] and the rate of [[energy]] [[Absorb (Physics)|absorption]] are equal the [[object]] will remain at a '''constant temperature'''. | : When the rate of [[energy]] [[emission]] and the rate of [[energy]] [[Absorb (Physics)|absorption]] are equal the [[object]] will remain at a '''constant temperature'''. | ||
| − | : If the rate of [[emission]] is greater than the rate of [[Absorb (Physics)|absorption]] then the [[object]] will decrease in [[temperature]] until the rates are equal. | + | : If the rate of [[emission]] is greater than the rate of [[Absorb (Physics)|absorption]] then the [[object]] will decrease in [[temperature]] until the rates are equal and it achieves '''temperature constancy'''. |
| − | : If the rate of [[emission]] is less than the rate of [[Absorb (Physics)|absorption]] then the [[object]] will increase in [[temperature]] until the rates are equal. | + | : If the rate of [[emission]] is less than the rate of [[Absorb (Physics)|absorption]] then the [[object]] will increase in [[temperature]] until the rates are equal and it achieves '''temperature constancy'''. |
Latest revision as of 16:14, 24 February 2019
Key Stage 4
Meaning
Temperature constancy occurs when the thermal energy emitted by an object is equal to the thermal energy absorbed by that object.
About Temperature Constancy
- Any object with a temperature above absolute zero emits black body radiation. As the temperature increases the energy emitted increases.
- Objects will absorb radiation that incidents its surface. The colour and reflectivity of the object determine the amount of radiation absorbed.
- When the rate of energy emission and the rate of energy absorption are equal the object will remain at a constant temperature.
- If the rate of emission is greater than the rate of absorption then the object will decrease in temperature until the rates are equal and it achieves temperature constancy.
- If the rate of emission is less than the rate of absorption then the object will increase in temperature until the rates are equal and it achieves temperature constancy.