Temperature Constancy
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.